#419641

CSS

:root {
  --kryptonite-green: #419641;
  --kryptonite-green-rgb: 65 150 65;
  --kryptonite-green-oklch: oklch(0.601 0.147 143.5);
}

.element {
  color: var(--kryptonite-green);
  background-color: hsl(120 40% 42%);
  border-color: oklch(0.601 0.147 143.5);
}

Tailwind CSS v4

@theme {
  --color-kryptonite-green: #419641;
  --color-kryptonite-green-50: #dcffdc;
  --color-kryptonite-green-100: #caf6cb;
  --color-kryptonite-green-200: #ace6ae;
  --color-kryptonite-green-300: #85cc89;
  --color-kryptonite-green-400: #65b463;
  --color-kryptonite-green-500: #3d9e3e;
  --color-kryptonite-green-600: #358536;
  --color-kryptonite-green-700: #2a6b2b;
  --color-kryptonite-green-800: #204e1b;
  --color-kryptonite-green-900: #163711;
  --color-kryptonite-green-950: #062104;
}

SCSS

$kryptonite-green: #419641;
$kryptonite-green-rgb: 65, 150, 65;
$kryptonite-green-light: mix(#fff, $kryptonite-green, 20%);
$kryptonite-green-dark: mix(#000, $kryptonite-green, 20%);

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