#99A137

CSS

:root {
  --chorus-of-frogs: #99a137;
  --chorus-of-frogs-rgb: 153 161 55;
  --chorus-of-frogs-oklch: oklch(0.682 0.128 113.5);
}

.element {
  color: var(--chorus-of-frogs);
  background-color: hsl(65 49% 42%);
  border-color: oklch(0.682 0.128 113.5);
}

Tailwind CSS v4

@theme {
  --color-chorus-of-frogs: #99a137;
  --color-chorus-of-frogs-50: #f3fad1;
  --color-chorus-of-frogs-100: #e6eebd;
  --color-chorus-of-frogs-200: #d1db9c;
  --color-chorus-of-frogs-300: #b4c071;
  --color-chorus-of-frogs-400: #9ea645;
  --color-chorus-of-frogs-500: #878e00;
  --color-chorus-of-frogs-600: #727803;
  --color-chorus-of-frogs-700: #5b6006;
  --color-chorus-of-frogs-800: #444600;
  --color-chorus-of-frogs-900: #2f3102;
  --color-chorus-of-frogs-950: #1c1d00;
}

SCSS

$chorus-of-frogs: #99a137;
$chorus-of-frogs-rgb: 153, 161, 55;
$chorus-of-frogs-light: mix(#fff, $chorus-of-frogs, 20%);
$chorus-of-frogs-dark: mix(#000, $chorus-of-frogs, 20%);

.element {
  color: $chorus-of-frogs;
  box-shadow: 0 0 0 2px rgba($chorus-of-frogs, 0.35);
}