#3A8353

CSS

:root {
  --monster-monstera: #3a8353;
  --monster-monstera-rgb: 58 131 83;
  --monster-monstera-oklch: oklch(0.55 0.105 152.6);
}

.element {
  color: var(--monster-monstera);
  background-color: hsl(141 39% 37%);
  border-color: oklch(0.55 0.105 152.6);
}

Tailwind CSS v4

@theme {
  --color-monster-monstera: #3a8353;
  --color-monster-monstera-50: #dfffe8;
  --color-monster-monstera-100: #cef3d9;
  --color-monster-monstera-200: #b2e2c1;
  --color-monster-monstera-300: #8cc8a0;
  --color-monster-monstera-400: #6cb180;
  --color-monster-monstera-500: #489a64;
  --color-monster-monstera-600: #3e8255;
  --color-monster-monstera-700: #316843;
  --color-monster-monstera-800: #244d2f;
  --color-monster-monstera-900: #183520;
  --color-monster-monstera-950: #08200f;
}

SCSS

$monster-monstera: #3a8353;
$monster-monstera-rgb: 58, 131, 83;
$monster-monstera-light: mix(#fff, $monster-monstera, 20%);
$monster-monstera-dark: mix(#000, $monster-monstera, 20%);

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