#757C20

CSS

:root {
  --olive: #757c20;
  --olive-rgb: 117 124 32;
  --olive-oklch: oklch(0.563 0.113 113.8);
}

.element {
  color: var(--olive);
  background-color: hsl(65 59% 31%);
  border-color: oklch(0.563 0.113 113.8);
}

Tailwind CSS v4

@theme {
  --color-olive: #757c20;
  --color-olive-50: #f3fad5;
  --color-olive-100: #e6edc3;
  --color-olive-200: #d1dba4;
  --color-olive-300: #b4bf7b;
  --color-olive-400: #9ea654;
  --color-olive-500: #868e26;
  --color-olive-600: #717823;
  --color-olive-700: #5b601c;
  --color-olive-800: #444610;
  --color-olive-900: #2f300a;
  --color-olive-950: #1b1c00;
}

SCSS

$olive: #757c20;
$olive-rgb: 117, 124, 32;
$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);
}