diff --git a/packages/devextreme-scss/scss/widgets/fluent/chat/_colors.scss b/packages/devextreme-scss/scss/widgets/fluent/chat/_colors.scss
index 6a514f3d053a..49459617c00f 100644
--- a/packages/devextreme-scss/scss/widgets/fluent/chat/_colors.scss
+++ b/packages/devextreme-scss/scss/widgets/fluent/chat/_colors.scss
@@ -20,26 +20,28 @@ $chat-messagelist-empty-message-color: $base-text-color !default;
 $chat-messagelist-empty-prompt-color: null !default;
 
 @if $mode == "light" {
-  $chat-information-color: darken($base-bg, 56.08) !default; // #707070
+  $chat-information-color: darken($base-bg, 56.08) !default;
 
-  $chat-messagelist-empty-icon-color: lighten($base-icon-color, 32.16) !default; // #B3B3B3
-  $chat-messagelist-empty-icon-background-color: darken($base-bg, 3.92) !default; // #F5F5F5
-  $chat-messagelist-empty-prompt-color: darken($base-label-color, 5.88) !default; // #616161
+  $chat-messagelist-empty-icon-color: lighten($base-icon-color, 32.16) !default;
+  $chat-messagelist-empty-icon-background-color: darken($base-bg, 3.92) !default;
+  $chat-messagelist-empty-prompt-color: darken($base-label-color, 5.88) !default;
 
   @if $color == "blue" {
     $chat-bubble-background-color-primary: lighten(desaturate(adjust-hue($base-accent, 3.8), 11.4), 55.5) !default;
+    $chat-messagelist-empty-icon-background-color: darken($base-bg, 3.92) !default;
   }
 
   @if $color == "saas" {
     $chat-bubble-background-color-primary: mix($base-bg, $base-accent, 90%) !default;
+    $chat-messagelist-empty-icon-background-color: $base-border-color !default;
   }
 }
 
 @if $mode == "dark" {
   $chat-bubble-background-color-primary: darken(desaturate(adjust-hue($base-accent, 356.3), 14.7), 49.4) !default;
-  $chat-information-color: lighten($base-bg, 43.92) !default; // #999
+  $chat-information-color: lighten($base-bg, 43.92) !default;
 
-  $chat-messagelist-empty-icon-color: darken($base-icon-color, 25.88) !default; // #6B6B6B
-  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default; // #3D3D3D
-  $chat-messagelist-empty-prompt-color: lighten($base-label-color, 7.84) !default; // #ADADAD
+  $chat-messagelist-empty-icon-color: darken($base-icon-color, 25.88) !default;
+  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default;
+  $chat-messagelist-empty-prompt-color: lighten($base-label-color, 7.84) !default;
 }
diff --git a/packages/devextreme-scss/scss/widgets/fluent/gridBase/_colors.scss b/packages/devextreme-scss/scss/widgets/fluent/gridBase/_colors.scss
index 83f2a5a7516a..e9c77b2950d8 100644
--- a/packages/devextreme-scss/scss/widgets/fluent/gridBase/_colors.scss
+++ b/packages/devextreme-scss/scss/widgets/fluent/gridBase/_colors.scss
@@ -166,12 +166,12 @@ $datagrid-icon-link-disabled-opacity: $button-disabled-icon-opacity;
 
 @if $mode == "light" {
   @if $color == "blue"{
-    $datagrid-row-focused-bg: lighten(desaturate(adjust-hue($base-accent, 3), 0.98), 50.00) !default; // #d0e5fb
+    $datagrid-row-focused-bg: lighten(desaturate(adjust-hue($base-accent, 3), 0.98), 50.00) !default;
     $datagrid-filter-row-background-color: darken($datagrid-base-background-color, 2%) !default;
   }
 
   @if $color == "saas" {
-    $datagrid-row-focused-bg: lighten(adjust-hue($base-accent, -1), 26.47) !default; // #dbe6ff
+    $datagrid-row-focused-bg: lighten(adjust-hue($base-accent, -1), 26.47) !default;
     $datagrid-filter-row-background-color: $base-typography-bg !default;
   }
   $datagrid-columnchooser-item-color: $datagrid-base-color !default;
diff --git a/packages/devextreme-scss/scss/widgets/generic/chat/_colors.scss b/packages/devextreme-scss/scss/widgets/generic/chat/_colors.scss
index a15a23f71f46..ca000571995c 100644
--- a/packages/devextreme-scss/scss/widgets/generic/chat/_colors.scss
+++ b/packages/devextreme-scss/scss/widgets/generic/chat/_colors.scss
@@ -6,7 +6,7 @@
 
 $chat-background-color: $base-bg !default;
 $chat-border-color: $base-border-color !default;
-$chat-avatar-color: $base-text-color !default;
+$chat-avatar-color: null !default;
 $chat-messagebox-border-color: $base-border-color !default;
 $chat-avatar-background-color: null !default;
 $chat-bubble-color-primary: null !default;
@@ -22,21 +22,21 @@ $chat-messagelist-empty-prompt-color: null !default;
 $button-default-border-color: darken($base-accent, 5%) !default;
 $button-default-text-bg-hover: color.change($button-default-border-color, $alpha: 0.1) !default;
 
-$chat-avatar-background-color: $base-border-color !default; // #DDDDDD
+$chat-avatar-background-color: $base-border-color !default;
 
 @if $color == "light" {
   $chat-avatar-color: $base-text-color !default;
   $button-normal-contained-bg-hover: darken($base-element-bg, 4%) !default;
 
   $chat-bubble-color-primary: $base-text-color !default;
-  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default; // #2D6DA31A
-  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default; // #F5F5F5
-  $chat-information-color: darken($base-bg, 41.57) !default; // #959595
-
-  $chat-messagelist-empty-icon-color: lighten($base-icon-color, 46.67) !default; // #AAAAAA
-  $chat-messagelist-empty-icon-background-color: darken($base-bg, 7.84) !default; // #EBEBEB 
-  $chat-messagelist-empty-message-color: darken($base-text-color, 6.67) !default; // #222222
-  $chat-messagelist-empty-prompt-color: lighten($base-label-color, 38.43) !default; // #959595
+  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default;
+  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default;
+  $chat-information-color: darken($base-bg, 41.57) !default;
+
+  $chat-messagelist-empty-icon-color: lighten($base-icon-color, 46.67) !default;
+  $chat-messagelist-empty-icon-background-color: darken($base-bg, 7.84) !default;
+  $chat-messagelist-empty-message-color: darken($base-text-color, 6.67) !default;
+  $chat-messagelist-empty-prompt-color: lighten($base-label-color, 38.43) !default;
 }
 
 @if $color == "dark" {
@@ -44,14 +44,14 @@ $chat-avatar-background-color: $base-border-color !default; // #DDDDDD
   $button-normal-contained-bg-hover: lighten($base-element-bg, 4%) !default;
 
   $chat-bubble-color-primary: $base-text-color !default;
-  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default; // #1997C61A
-  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default; // #343434
-  $chat-information-color: lighten($base-bg, 32.55) !default; // #7D7D7D
-
-  $chat-messagelist-empty-icon-color: darken(#dedede, 37.25) !default; // #7F7F7F
-  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default; // #3E3E3E
-  $chat-messagelist-empty-message-color: lighten($base-text-color, 12.94) !default; // #FFFFFF
-  $chat-messagelist-empty-prompt-color: darken($base-label-color, 38.04) !default; // #7D7D7D
+  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default;
+  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default;
+  $chat-information-color: lighten($base-bg, 32.55) !default;
+
+  $chat-messagelist-empty-icon-color: darken($base-icon-color, 37.25) !default;
+  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default;
+  $chat-messagelist-empty-message-color: lighten($base-text-color, 12.94) !default;
+  $chat-messagelist-empty-prompt-color: darken($base-label-color, 38.04) !default;
 }
 
 @if $color == "carmine" {
@@ -59,29 +59,29 @@ $chat-avatar-background-color: $base-border-color !default; // #DDDDDD
   $button-normal-contained-bg-hover: darken($base-element-bg, 4%) !default;
 
   $chat-bubble-color-primary: $base-text-color !default;
-  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default; // #2D6DA31A
-  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default; // #F5F5F5
-  $chat-information-color: darken($base-bg, 41.57) !default; // #959595
-
-  $chat-messagelist-empty-icon-color: lighten($base-icon-color, 46.67) !default; // #AAAAAA
-  $chat-messagelist-empty-icon-background-color: darken($base-bg, 7.84) !default; // #EBEBEB 
-  $chat-messagelist-empty-message-color: darken($base-text-color, 6.67) !default; // #222222
-  $chat-messagelist-empty-prompt-color: lighten($base-label-color, 38.43) !default; // #959595
+  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default;
+  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default;
+  $chat-information-color: darken($base-bg, 41.57) !default;
+
+  $chat-messagelist-empty-icon-color: darken($base-icon-color, 37.25) !default;
+  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default;
+  $chat-messagelist-empty-message-color: lighten($base-text-color, 12.94) !default;
+  $chat-messagelist-empty-prompt-color: darken($base-label-color, 38.04) !default;
 }
 
 @if $color == "contrast" {
-  $chat-avatar-color: $base-inverted-color !default;
+  $chat-avatar-color: $base-inverted-text-color !default;
   $button-normal-contained-bg-hover: $base-hover-color !default;
 
   $chat-bubble-color-primary: $base-inverted-text-color !default;
   $chat-bubble-background-color-primary: $base-inverted-bg !default;
-  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default; // #343434
-  $chat-information-color: $base-inverted-color !default;
+  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default;
+  $chat-information-color: $base-text-color !default;
 
-  $chat-messagelist-empty-icon-color: darken(#dedede, 37.25) !default; // #7F7F7F
-  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default; // #3E3E3E
-  $chat-messagelist-empty-message-color: lighten($base-text-color, 12.94) !default; // #FFFFFF
-  $chat-messagelist-empty-prompt-color: darken($base-label-color, 38.04) !default; // #7D7D7D
+  $chat-messagelist-empty-icon-color: $base-bg !default;
+  $chat-messagelist-empty-icon-background-color: $base-inverted-bg !default;
+  $chat-messagelist-empty-message-color: $base-text-color !default;
+  $chat-messagelist-empty-prompt-color: $base-text-color !default;
 }
 
 @if $color == "darkmoon" {
@@ -89,14 +89,14 @@ $chat-avatar-background-color: $base-border-color !default; // #DDDDDD
   $button-normal-contained-bg-hover: lighten($base-element-bg, 4%) !default;
 
   $chat-bubble-color-primary: $base-text-color !default;
-  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default; // #1997C61A
-  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default; // #343434
-  $chat-information-color: lighten($base-bg, 32.55) !default; // #7D7D7D
-
-  $chat-messagelist-empty-icon-color: darken(#dedede, 37.25) !default; // #7F7F7F
-  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default; // #3E3E3E
-  $chat-messagelist-empty-message-color: lighten($base-text-color, 12.94) !default; // #FFFFFF
-  $chat-messagelist-empty-prompt-color: darken($base-label-color, 38.04) !default; // #7D7D7D
+  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default;
+  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default;
+  $chat-information-color: lighten($base-bg, 32.55) !default;
+
+  $chat-messagelist-empty-icon-color: lighten($base-icon-color, 46.67) !default;
+  $chat-messagelist-empty-icon-background-color: darken($base-bg, 7.84) !default;
+  $chat-messagelist-empty-message-color: darken($base-text-color, 6.67) !default;
+  $chat-messagelist-empty-prompt-color: lighten($base-label-color, 38.43) !default;
 }
 
 @if $color == "darkviolet" {
@@ -104,28 +104,28 @@ $chat-avatar-background-color: $base-border-color !default; // #DDDDDD
   $button-normal-contained-bg-hover: lighten($base-element-bg, 4%) !default;
 
   $chat-bubble-color-primary: $base-text-color !default;
-  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default; // #1997C61A
-  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default; // #343434
-  $chat-information-color: lighten($base-bg, 32.55) !default; // #7D7D7D
-
-  $chat-messagelist-empty-icon-color: darken(#dedede, 37.25) !default; // #7F7F7F
-  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default; // #3E3E3E
-  $chat-messagelist-empty-message-color: lighten($base-text-color, 12.94) !default; // #FFFFFF
-  $chat-messagelist-empty-prompt-color: darken($base-label-color, 38.04) !default; // #7D7D7D
+  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default;
+  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default;
+  $chat-information-color: lighten($base-bg, 32.55) !default;
+
+  $chat-messagelist-empty-icon-color: darken($base-icon-color, 37.25) !default;
+  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default;
+  $chat-messagelist-empty-message-color: lighten($base-text-color, 12.94) !default;
+  $chat-messagelist-empty-prompt-color: darken($base-label-color, 38.04) !default;
 }
 
 @if $color == "greenmist" {
   $chat-avatar-color: $base-text-color !default;
   $button-normal-contained-bg-hover: darken($base-element-bg, 4%) !default;
 
-  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default; // #2D6DA31A
-  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default; // #F5F5F5
-  $chat-information-color: darken($base-bg, 41.57) !default; // #959595
+  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default;
+  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default;
+  $chat-information-color: darken($base-bg, 41.57) !default;
 
-  $chat-messagelist-empty-icon-color: lighten($base-icon-color, 46.67) !default; // #AAAAAA
-  $chat-messagelist-empty-icon-background-color: darken($base-bg, 7.84) !default; // #EBEBEB 
-  $chat-messagelist-empty-message-color: darken($base-text-color, 6.67) !default; // #222222
-  $chat-messagelist-empty-prompt-color: lighten($base-label-color, 38.43) !default; // #959595
+  $chat-messagelist-empty-icon-color: darken($base-icon-color, 37.25) !default;
+  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default;
+  $chat-messagelist-empty-message-color: lighten($base-text-color, 12.94) !default;
+  $chat-messagelist-empty-prompt-color: darken($base-label-color, 38.04) !default;
 }
 
 @if $color == "softblue" {
@@ -133,12 +133,12 @@ $chat-avatar-background-color: $base-border-color !default; // #DDDDDD
   $button-normal-contained-bg-hover: darken($base-element-bg, 4%) !default;
 
   $chat-bubble-color-primary: $base-text-color !default;
-  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default; // #2D6DA31A
-  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default; // #F5F5F5
-  $chat-information-color: darken($base-bg, 41.57) !default; // #959595
-
-  $chat-messagelist-empty-icon-color: lighten($base-icon-color, 46.67) !default; // #AAAAAA
-  $chat-messagelist-empty-icon-background-color: darken($base-bg, 7.84) !default; // #EBEBEB 
-  $chat-messagelist-empty-message-color: darken($base-text-color, 6.67) !default; // #222222
-  $chat-messagelist-empty-prompt-color: lighten($base-label-color, 38.43) !default; // #959595
+  $chat-bubble-background-color-primary: $button-default-text-bg-hover !default;
+  $chat-bubble-background-color-secondary: $button-normal-contained-bg-hover !default;
+  $chat-information-color: darken($base-bg, 41.57) !default;
+
+  $chat-messagelist-empty-icon-color: darken($base-icon-color, 37.25) !default;
+  $chat-messagelist-empty-icon-background-color: lighten($base-bg, 7.84) !default;
+  $chat-messagelist-empty-message-color: lighten($base-text-color, 12.94) !default;
+  $chat-messagelist-empty-prompt-color: darken($base-label-color, 38.04) !default;
 }
diff --git a/packages/devextreme-scss/scss/widgets/material/chat/_colors.scss b/packages/devextreme-scss/scss/widgets/material/chat/_colors.scss
index 44fa6014073d..22d37346b27f 100644
--- a/packages/devextreme-scss/scss/widgets/material/chat/_colors.scss
+++ b/packages/devextreme-scss/scss/widgets/material/chat/_colors.scss
@@ -20,13 +20,13 @@ $chat-messagelist-empty-message-color: rgba($base-inverted-bg, 0.87) !default;
 $chat-messagelist-empty-prompt-color: rgba($base-inverted-bg, 0.6) !default;
 
 @if $mode == "light" {
-  $chat-bubble-background-color-primary: rgba($base-accent, 0.08) !default; // #03A9F414
-  $chat-bubble-background-color-secondary: rgba($base-inverted-bg, 0.08) !default; // #00000014
-  $chat-information-color: rgba(darken($base-bg, 100.00), 0.6) !default; // #0009
+  $chat-bubble-background-color-primary: rgba($base-accent, 0.08) !default;
+  $chat-bubble-background-color-secondary: rgba($base-inverted-bg, 0.08) !default;
+  $chat-information-color: rgba(darken($base-bg, 100.00), 0.6) !default;
 }
 
 @else if $mode == "dark" {
-  $chat-bubble-background-color-primary: rgba(lighten($base-accent, 19.22), 0.08) !default; // #5CCBFD14
-  $chat-bubble-background-color-secondary: rgba(lighten(desaturate(adjust-hue(#363640, -240), 8.47), 76.86), 0.08) !default; // #FFFFFF14
-  $chat-information-color: rgba(lighten(desaturate(adjust-hue(#363640, -240), 8.47), 76.86), 0.6) !default; // #FFF9
+  $chat-bubble-background-color-primary: rgba(lighten($base-accent, 19.22), 0.08) !default;
+  $chat-bubble-background-color-secondary: rgba(lighten(desaturate(adjust-hue($base-bg, -240), 8.47), 76.86), 0.08) !default;
+  $chat-information-color: rgba(lighten(desaturate(adjust-hue($base-bg, -240), 8.47), 76.86), 0.6) !default;
 }