#738000

CSS

:root {
  --olive: #738000;
  --olive-rgb: 115 128 0;
  --olive-oklch: oklch(0.569 0.131 116.6);
}

.element {
  color: var(--olive);
  background-color: hsl(66 100% 25%);
  border-color: oklch(0.569 0.131 116.6);
}

Tailwind CSS v4

@theme {
  --color-olive: #738000;
  --color-olive-50: #f1fbd1;
  --color-olive-100: #e3efbe;
  --color-olive-200: #cedd9d;
  --color-olive-300: #b0c172;
  --color-olive-400: #9aa846;
  --color-olive-500: #829000;
  --color-olive-600: #6e7a07;
  --color-olive-700: #586208;
  --color-olive-800: #424701;
  --color-olive-900: #2d3102;
  --color-olive-950: #1a1d00;
}

SCSS

$olive: #738000;
$olive-rgb: 115, 128, 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);
}