#007B63

CSS

:root {
  --tropical-rainforest: #007b63;
  --tropical-rainforest-rgb: 0 123 99;
  --tropical-rainforest-oklch: oklch(0.52 0.1 172.8);
}

.element {
  color: var(--tropical-rainforest);
  background-color: hsl(168 100% 24%);
  border-color: oklch(0.52 0.1 172.8);
}

Tailwind CSS v4

@theme {
  --color-tropical-rainforest: #007b63;
  --color-tropical-rainforest-50: #d9fff3;
  --color-tropical-rainforest-100: #c6f3e6;
  --color-tropical-rainforest-200: #a8e3d2;
  --color-tropical-rainforest-300: #7ec9b4;
  --color-tropical-rainforest-400: #58b299;
  --color-tropical-rainforest-500: #249b80;
  --color-tropical-rainforest-600: #22836c;
  --color-tropical-rainforest-700: #1c6956;
  --color-tropical-rainforest-800: #134d3e;
  --color-tropical-rainforest-900: #0d362a;
  --color-tropical-rainforest-950: #012118;
}

SCSS

$tropical-rainforest: #007b63;
$tropical-rainforest-rgb: 0, 123, 99;
$tropical-rainforest-light: mix(#fff, $tropical-rainforest, 20%);
$tropical-rainforest-dark: mix(#000, $tropical-rainforest, 20%);

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