diff --git a/assets/css/custom.css b/assets/css/custom.css
index 3b32739d1cf..5b831ebcce4 100644
--- a/assets/css/custom.css
+++ b/assets/css/custom.css
@@ -293,6 +293,10 @@ legend {
   color: #920b60;
 }
 
+.highlight .n {
+  color: #6c7c7c;
+}
+
 .rst-content dl:not(.docutils) dt {
   background: #f1eeff;
   color: #491dc3;
@@ -521,7 +525,7 @@ are added in post-processing.
 }
 
 /* Fix for text wrap in sphinx tables:
- * https://rackerlabs.github.io/docs-rackspace/tools/rtd-tables.html 
+ * https://rackerlabs.github.io/docs-rackspace/tools/rtd-tables.html
  */
 @media screen and (min-width: 767px) {
 
@@ -530,7 +534,7 @@ are added in post-processing.
           this as on RTD they are loaded after this stylesheet */
        white-space: normal !important;
     }
- 
+
     .wy-table-responsive {
        overflow: visible !important;
     }
@@ -599,7 +603,7 @@ div.cell_output table{
 
 /*
  * libcudf doxygen rules start
- * 
+ *
  */
 
 /* sm-dox is the CSS class Doxygen uses for the main navigation menu bar */
@@ -609,7 +613,7 @@ div.cell_output table{
 }
 
 /* Menu links */
-.sm-dox a, 
+.sm-dox a,
 .sm-dox a:focus,
 .sm-dox a:hover,
 .sm-dox a:active,
@@ -618,7 +622,7 @@ div.cell_output table{
   color: white;                     /* rapids.ai menu white font */
   font-family:"Open Sans",sans-serif; /* rapids.ai menu font family */
   /* rapids.ai uppercase menus, no decoration or shadows, 1em size */
-  text-decoration: none;              
+  text-decoration: none;
   text-transform: uppercase;
   text-shadow: none;
   font-weight: normal;
@@ -655,7 +659,7 @@ div.cell_output table{
 
 .sm-dox ul a:hover {
   background-image:none;
-  background-color: #7306ff;            
+  background-color: #7306ff;
   font-size: 1em;
   text-shadow: none;
   -webkit-transition: all 0.3s ease-in-out;
@@ -672,7 +676,7 @@ div.cell_output table{
   font-size: 13px;             /* Bigger than Doxygen default looks a bit better */
   background-image:none;       /* Override Doxygen gradient background image */
   background-color: #FAF6FF; /* A nearly white RAPIDS purple background */
-  border-top:none;             /* Override Doxygen top border for class hierarchy menu since 
+  border-top:none;             /* Override Doxygen top border for class hierarchy menu since
                                   it doesn't match the menu above. */
 }
 
@@ -688,7 +692,7 @@ div.cell_output table{
   white-space: normal;                /* Allow text wrapping for long class names */
   min-width:   512px;                 /* But don't wrap them too much. */
 
-  /* This indent and padding causes any long class names that are wrapped to be indented on 
+  /* This indent and padding causes any long class names that are wrapped to be indented on
      wrapped lines */
   text-indent: -65px;
   padding-left: 55px;
@@ -708,10 +712,10 @@ div.cell_output table{
 
 /*
  * libcudf doxygen rules end
- * 
+ *
  */
 
 .table_br {
   display: block;
   margin-bottom: 5px;
-}
\ No newline at end of file
+}