@font-palette-values --identifier {
  font-family: Bixa;
}
.my-class {
  font-palette: --identifier;
}

The <dashed-ident> is a user defined identifier, that while it looks like a CSS custom property behaves in a different way and is not wrapped in a CSS var() function.

font-family

Specifies the name of the font family that this palette can be applied to.

base-palette

Specifies the name or index of the base-palette, created by the font-maker, to use.

override-colors

Specifies the colors in the base palette to override.

@font-palette-values = 
  @font-palette-values <dashed-ident> { <declaration-list> }  

This example shows how you can change some or all of the colors in a color font.

HTML

<p>default colors</p>
<p class="alternate">alternate colors</p>

CSS

@import url(https://fonts.googleapis.com/css2?family=Bungee+Spice);
p {
  font-family: "Bungee Spice";
  font-size: 2rem;
}
@font-palette-values --Alternate {
  font-family: "Bungee Spice";
  override-colors:
    0 #00ffbb,
    1 #007744;
}
.alternate {
  font-palette: --Alternate;
}

Result

When overriding colors of the normal or base-palette at index 0 you do not need to declare which base-palette to use. This should only be done when overriding a different base-palette. If you are overriding all the colors then there is also no need to specify the base-palette to use.

• font-palette property
• font-family descriptor
• base-palette descriptor
• override-colors descriptor
• CSSFontPaletteValuesRule