#7B6F00

CSS

:root {
  --olive: #7b6f00;
  --olive-rgb: 123 111 0;
  --olive-oklch: oklch(0.536 0.112 101.9);
}

.element {
  color: var(--olive);
  background-color: hsl(54 100% 24%);
  border-color: oklch(0.536 0.112 101.9);
}

Tailwind CSS v4

@theme {
  --color-olive: #7b6f00;
  --color-olive-50: #faf7d3;
  --color-olive-100: #eeeabf;
  --color-olive-200: #dcd79f;
  --color-olive-300: #c1bb76;
  --color-olive-400: #aca14d;
  --color-olive-500: #958817;
  --color-olive-600: #7e7318;
  --color-olive-700: #655c13;
  --color-olive-800: #4c430a;
  --color-olive-900: #342e07;
  --color-olive-950: #201b00;
}

SCSS

$olive: #7b6f00;
$olive-rgb: 123, 111, 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);
}