#837300

CSS

:root {
  --olive: #837300;
  --olive-rgb: 131 115 0;
  --olive-oklch: oklch(0.553 0.115 99.6);
}

.element {
  color: var(--olive);
  background-color: hsl(53 100% 26%);
  border-color: oklch(0.553 0.115 99.6);
}

Tailwind CSS v4

@theme {
  --color-olive: #837300;
  --color-olive-50: #fbf7d2;
  --color-olive-100: #efeabe;
  --color-olive-200: #ded79d;
  --color-olive-300: #c3ba73;
  --color-olive-400: #afa049;
  --color-olive-500: #99870a;
  --color-olive-600: #817210;
  --color-olive-700: #675b0e;
  --color-olive-800: #4d4206;
  --color-olive-900: #362e05;
  --color-olive-950: #211a00;
}

SCSS

$olive: #837300;
$olive-rgb: 131, 115, 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);
}