#757C00

CSS

:root {
  --olive: #757c00;
  --olive-rgb: 117 124 0;
  --olive-oklch: oklch(0.561 0.126 113.7);
}

.element {
  color: var(--olive);
  background-color: hsl(63 100% 24%);
  border-color: oklch(0.561 0.126 113.7);
}

Tailwind CSS v4

@theme {
  --color-olive: #757c00;
  --color-olive-50: #f3fad2;
  --color-olive-100: #e5eebe;
  --color-olive-200: #d1db9e;
  --color-olive-300: #b4c073;
  --color-olive-400: #9ea647;
  --color-olive-500: #868e02;
  --color-olive-600: #72780c;
  --color-olive-700: #5b600b;
  --color-olive-800: #444603;
  --color-olive-900: #2f3103;
  --color-olive-950: #1c1d00;
}

SCSS

$olive: #757c00;
$olive-rgb: 117, 124, 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);
}