Wren

CSS

:root {
  --wren: #4a4139;
  --wren-rgb: 74 65 57;
  --wren-oklch: oklch(0.382 0.018 63.9);
}

.element {
  color: var(--wren);
  background-color: hsl(28 13% 26%);
  border-color: oklch(0.382 0.018 63.9);
}

Tailwind CSS v4

@theme {
  --color-wren: #4a4139;
  --color-wren-50: #f9f4f0;
  --color-wren-100: #ece7e2;
  --color-wren-200: #dad3cc;
  --color-wren-300: #beb6ae;
  --color-wren-400: #a69c94;
  --color-wren-500: #8f847a;
  --color-wren-600: #797067;
  --color-wren-700: #615953;
  --color-wren-800: #47413c;
  --color-wren-900: #312d29;
  --color-wren-950: #1d1a17;
}

SCSS

$wren: #4a4139;
$wren-rgb: 74, 65, 57;
$wren-light: mix(#fff, $wren, 20%);
$wren-dark: mix(#000, $wren, 20%);

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