#7F770D

CSS

:root {
  --olive: #7f770d;
  --olive-rgb: 127 119 13;
  --olive-oklch: oklch(0.559 0.115 104.7);
}

.element {
  color: var(--olive);
  background-color: hsl(56 81% 27%);
  border-color: oklch(0.559 0.115 104.7);
}

Tailwind CSS v4

@theme {
  --color-olive: #7f770d;
  --color-olive-50: #f8f8d3;
  --color-olive-100: #ecebbf;
  --color-olive-200: #dad89f;
  --color-olive-300: #bebc75;
  --color-olive-400: #a9a24c;
  --color-olive-500: #928914;
  --color-olive-600: #7c7416;
  --color-olive-700: #635d12;
  --color-olive-800: #4a4409;
  --color-olive-900: #332f06;
  --color-olive-950: #1f1b00;
}

SCSS

$olive: #7f770d;
$olive-rgb: 127, 119, 13;
$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);
}