#177A65

CSS

:root {
  --tropical-rainforest: #177a65;
  --tropical-rainforest-rgb: 23 122 101;
  --tropical-rainforest-oklch: oklch(0.52 0.092 174.1);
}

.element {
  color: var(--tropical-rainforest);
  background-color: hsl(167 68% 28%);
  border-color: oklch(0.52 0.092 174.1);
}

Tailwind CSS v4

@theme {
  --color-tropical-rainforest: #177a65;
  --color-tropical-rainforest-50: #dbfef4;
  --color-tropical-rainforest-100: #c9f3e7;
  --color-tropical-rainforest-200: #abe2d3;
  --color-tropical-rainforest-300: #83c7b6;
  --color-tropical-rainforest-400: #5eb09a;
  --color-tropical-rainforest-500: #319a82;
  --color-tropical-rainforest-600: #2c826e;
  --color-tropical-rainforest-700: #236858;
  --color-tropical-rainforest-800: #194d3f;
  --color-tropical-rainforest-900: #10352b;
  --color-tropical-rainforest-950: #032018;
}

SCSS

$tropical-rainforest: #177a65;
$tropical-rainforest-rgb: 23, 122, 101;
$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);
}