https://github.com/TychoWerner/AzuraCastMods/tree/main/Applying%20these%20mods
https://github.com/TychoWerner/AzuraCastMods/tree/main/Hide%20a%20button%202nd%20button
The volume slider is not visible on Chromium based browsers (visible on Firefox), see AzuraCast/AzuraCast#5537. The volume slider's appearance cannot be modified (?) either.
Replace the color hex values and font weight/size with what you need. Below #FF0000 (red) is used everywhere.
/*song title color */
[data-theme] body.embed .now-playing-title {
color: #FF0000;
}
/* artist name*/
[data-theme] body.embed .now-playing-artist {
color: #FF0000;
font-weight: bold;
font-size: 1.1em;
}
/* stream select button color */
#btn-select-stream {
color: #FF0000;
}
/* buttons volume & play color */
[data-theme] body.embed .material-icons {
color: #FF0000;
}
[data-theme] body.embed .material-icons.outlined.lg {
color: #FF0000;
}
/* center h & v playlist names on schedule page */
.page-minimal.schedule.embed .fc-event-title-container {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
font-size: 1.1em;
}
.page-minimal.schedule.embed .fc-event-title.fc-sticky {
text-align: center;
color: #FF0000;
}
/* hide order column in history widget */
[data-theme] body.embed div.song strong.order {
display: none !important;
}
/* align "played x mn ago" to the right in history widget and add top padding */
[data-theme] body.embed div.song small.date-played.text-muted span {
position: absolute;
right: 5px;
padding-top: 10px;
}