#23B078

CSS

:root {
  --cosmic-green: #23b078;
  --cosmic-green-rgb: 35 176 120;
  --cosmic-green-oklch: oklch(0.672 0.142 160.5);
}

.element {
  color: var(--cosmic-green);
  background-color: hsl(156 67% 41%);
  border-color: oklch(0.672 0.142 160.5);
}

Tailwind CSS v4

@theme {
  --color-cosmic-green: #23b078;
  --color-cosmic-green-50: #d2ffe9;
  --color-cosmic-green-100: #bef7da;
  --color-cosmic-green-200: #9be8c2;
  --color-cosmic-green-300: #6ccea2;
  --color-cosmic-green-400: #3db882;
  --color-cosmic-green-500: #00a265;
  --color-cosmic-green-600: #008956;
  --color-cosmic-green-700: #006e45;
  --color-cosmic-green-800: #00512f;
  --color-cosmic-green-900: #003820;
  --color-cosmic-green-950: #00230f;
}

SCSS

$cosmic-green: #23b078;
$cosmic-green-rgb: 35, 176, 120;
$cosmic-green-light: mix(#fff, $cosmic-green, 20%);
$cosmic-green-dark: mix(#000, $cosmic-green, 20%);

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