Turtle

CSS

:root {
  --turtle: #523f31;
  --turtle-rgb: 82 63 49;
  --turtle-oklch: oklch(0.384 0.035 57.9);
}

.element {
  color: var(--turtle);
  background-color: hsl(25 25% 26%);
  border-color: oklch(0.384 0.035 57.9);
}

Tailwind CSS v4

@theme {
  --color-turtle: #523f31;
  --color-turtle-50: #fdf3eb;
  --color-turtle-100: #f1e5dd;
  --color-turtle-200: #e0d1c6;
  --color-turtle-300: #c5b4a6;
  --color-turtle-400: #af9a8b;
  --color-turtle-500: #998170;
  --color-turtle-600: #816d5f;
  --color-turtle-700: #67574c;
  --color-turtle-800: #4c3f37;
  --color-turtle-900: #352c25;
  --color-turtle-950: #201914;
}

SCSS

$turtle: #523f31;
$turtle-rgb: 82, 63, 49;
$turtle-light: mix(#fff, $turtle, 20%);
$turtle-dark: mix(#000, $turtle, 20%);

.element {
  color: $turtle;
  box-shadow: 0 0 0 2px rgba($turtle, 0.35);
}