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 {
  color: #905;
}

.token.selector,
.token.attr-name,
.token.string {
  color: #5e8e01;
}

.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string {
  color: #a67f59;
}

.token.atrule,
.token.attr-value,
.token.keyword {
  color: #0070a3;
}

.token.regex,
.token.important {
  color: #e90;
}

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

.token.entity {
  cursor: help;
}