#889500

CSS

:root {
  --snakes-in-the-grass: #889500;
  --snakes-in-the-grass-rgb: 136 149 0;
  --snakes-in-the-grass-oklch: oklch(0.637 0.145 115.8);
}

.element {
  color: var(--snakes-in-the-grass);
  background-color: hsl(65 100% 29%);
  border-color: oklch(0.637 0.145 115.8);
}

Tailwind CSS v4

@theme {
  --color-snakes-in-the-grass: #889500;
  --color-snakes-in-the-grass-50: #f1fbcd;
  --color-snakes-in-the-grass-100: #e3efb8;
  --color-snakes-in-the-grass-200: #cfdd95;
  --color-snakes-in-the-grass-300: #b1c168;
  --color-snakes-in-the-grass-400: #9ba835;
  --color-snakes-in-the-grass-500: #839000;
  --color-snakes-in-the-grass-600: #6f7a00;
  --color-snakes-in-the-grass-700: #586200;
  --color-snakes-in-the-grass-800: #424700;
  --color-snakes-in-the-grass-900: #2e3100;
  --color-snakes-in-the-grass-950: #1b1d00;
}

SCSS

$snakes-in-the-grass: #889500;
$snakes-in-the-grass-rgb: 136, 149, 0;
$snakes-in-the-grass-light: mix(#fff, $snakes-in-the-grass, 20%);
$snakes-in-the-grass-dark: mix(#000, $snakes-in-the-grass, 20%);

.element {
  color: $snakes-in-the-grass;
  box-shadow: 0 0 0 2px rgba($snakes-in-the-grass, 0.35);
}