#867700

CSS

:root {
  --olive: #867700;
  --olive-rgb: 134 119 0;
  --olive-oklch: oklch(0.566 0.118 100.5);
}

.element {
  color: var(--olive);
  background-color: hsl(53 100% 26%);
  border-color: oklch(0.566 0.118 100.5);
}

Tailwind CSS v4

@theme {
  --color-olive: #867700;
  --color-olive-50: #fbf7d1;
  --color-olive-100: #efeabd;
  --color-olive-200: #ddd79c;
  --color-olive-300: #c3ba71;
  --color-olive-400: #aea046;
  --color-olive-500: #988700;
  --color-olive-600: #817209;
  --color-olive-700: #675c09;
  --color-olive-800: #4d4203;
  --color-olive-900: #352e03;
  --color-olive-950: #211a00;
}

SCSS

$olive: #867700;
$olive-rgb: 134, 119, 0;
$olive-light: mix(#fff, $olive, 20%);
$olive-dark: mix(#000, $olive, 20%);

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