devdocs/assets/stylesheets/components/_prism.scss

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata,
.token.punctuation {
  color: $textColorLight;
}

.namespace {
  opacity: .7;
}

.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol,
.token.deleted {
  @if $style == 'dark' {
    color: #eb8160;
  } @else {
    color: #905;
  }
}

.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
  @if $style == 'dark' {
    color: #ddcf88;
  } @else {
    color: #5e8e01;
  }
}

.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string {
  @if $style == 'dark' {
    color: #b1c676;
  } @else {
    color: #a67f59;
  }
}

.token.atrule,
.token.attr-value,
.token.keyword {
  @if $style == 'dark' {
    color: #91b3ed;
  } @else {
    color: #0070a3;
  }
}

.token.function {
  @if $style == 'dark' {
    color: #c79e6b;
  } @else {
    color: #dd4a68;
  }
}

.token.regex,
.token.important,
.token.variable {
  @if $style == 'dark' {
    color: #e9c062;
  } @else {
    color: #e90;
  }
}

.token.important {
  font-weight: bold;
}