#7F7611

CSS

:root {
  --olive: #7f7611;
  --olive-rgb: 127 118 17;
  --olive-oklch: oklch(0.557 0.112 103.9);
}

.element {
  color: var(--olive);
  background-color: hsl(55 76% 28%);
  border-color: oklch(0.557 0.112 103.9);
}

Tailwind CSS v4

@theme {
  --color-olive: #7f7611;
  --color-olive-50: #f9f8d3;
  --color-olive-100: #ecebc0;
  --color-olive-200: #dad8a0;
  --color-olive-300: #bfbb77;
  --color-olive-400: #aaa24d;
  --color-olive-500: #938919;
  --color-olive-600: #7c7419;
  --color-olive-700: #645d15;
  --color-olive-800: #4a430b;
  --color-olive-900: #342f07;
  --color-olive-950: #1f1b00;
}

SCSS

$olive: #7f7611;
$olive-rgb: 127, 118, 17;
$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);
}