#125D00

CSS

:root {
  --lincoln-green: #125d00;
  --lincoln-green-rgb: 18 93 0;
  --lincoln-green-oklch: oklch(0.418 0.137 140.9);
}

.element {
  color: var(--lincoln-green);
  background-color: hsl(108 100% 18%);
  border-color: oklch(0.418 0.137 140.9);
}

Tailwind CSS v4

@theme {
  --color-lincoln-green: #125d00;
  --color-lincoln-green-50: #dfffdc;
  --color-lincoln-green-100: #cef4cb;
  --color-lincoln-green-200: #b2e4ae;
  --color-lincoln-green-300: #8dca89;
  --color-lincoln-green-400: #6fb264;
  --color-lincoln-green-500: #4c9c3f;
  --color-lincoln-green-600: #428437;
  --color-lincoln-green-700: #34692b;
  --color-lincoln-green-800: #274d1b;
  --color-lincoln-green-900: #1a3612;
  --color-lincoln-green-950: #0b2104;
}

SCSS

$lincoln-green: #125d00;
$lincoln-green-rgb: 18, 93, 0;
$lincoln-green-light: mix(#fff, $lincoln-green, 20%);
$lincoln-green-dark: mix(#000, $lincoln-green, 20%);

.element {
  color: $lincoln-green;
  box-shadow: 0 0 0 2px rgba($lincoln-green, 0.35);
}