Inline colors, resolved through a declared token map, checked against WCAG AA contrast ratios.
Opt-in: the rule only runs when tokens are declared, since without a token map it cannot know what a color name means. Declare them once and your design system becomes the test fixture:
config :farol, :tokens, %{
"bg" => "#000A0F",
"fg" => "#F7F7FF",
"accent" => "#9655FF"
}