#378516

CSS

:root {
  --green-bell-pepper: #378516;
  --green-bell-pepper-rgb: 55 133 22;
  --green-bell-pepper-oklch: oklch(0.547 0.16 138.7);
}

.element {
  color: var(--green-bell-pepper);
  background-color: hsl(102 72% 30%);
  border-color: oklch(0.547 0.16 138.7);
}

Tailwind CSS v4

@theme {
  --color-green-bell-pepper: #378516;
  --color-green-bell-pepper-50: #ddffd6;
  --color-green-bell-pepper-100: #cbf6c4;
  --color-green-bell-pepper-200: #afe6a5;
  --color-green-bell-pepper-300: #89cc7d;
  --color-green-bell-pepper-400: #6ab453;
  --color-green-bell-pepper-500: #469e23;
  --color-green-bell-pepper-600: #3c8521;
  --color-green-bell-pepper-700: #306b1a;
  --color-green-bell-pepper-800: #254e0c;
  --color-green-bell-pepper-900: #193608;
  --color-green-bell-pepper-950: #092100;
}

SCSS

$green-bell-pepper: #378516;
$green-bell-pepper-rgb: 55, 133, 22;
$green-bell-pepper-light: mix(#fff, $green-bell-pepper, 20%);
$green-bell-pepper-dark: mix(#000, $green-bell-pepper, 20%);

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