#7B8B00

CSS

:root {
  --snakes-in-the-grass: #7b8b00;
  --snakes-in-the-grass-rgb: 123 139 0;
  --snakes-in-the-grass-oklch: oklch(0.603 0.14 117.6);
}

.element {
  color: var(--snakes-in-the-grass);
  background-color: hsl(67 100% 27%);
  border-color: oklch(0.603 0.14 117.6);
}

Tailwind CSS v4

@theme {
  --color-snakes-in-the-grass: #7b8b00;
  --color-snakes-in-the-grass-50: #f0fccf;
  --color-snakes-in-the-grass-100: #e2efbb;
  --color-snakes-in-the-grass-200: #cddd99;
  --color-snakes-in-the-grass-300: #afc26d;
  --color-snakes-in-the-grass-400: #98a93e;
  --color-snakes-in-the-grass-500: #809100;
  --color-snakes-in-the-grass-600: #6c7b00;
  --color-snakes-in-the-grass-700: #566200;
  --color-snakes-in-the-grass-800: #414700;
  --color-snakes-in-the-grass-900: #2d3200;
  --color-snakes-in-the-grass-950: #1a1d00;
}

SCSS

$snakes-in-the-grass: #7b8b00;
$snakes-in-the-grass-rgb: 123, 139, 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);
}