#81A296

CSS

:root {
  --japanese-bonsai: #81a296;
  --japanese-bonsai-rgb: 129 162 150;
  --japanese-bonsai-oklch: oklch(0.684 0.04 170.9);
}

.element {
  color: var(--japanese-bonsai);
  background-color: hsl(158 15% 57%);
  border-color: oklch(0.684 0.04 170.9);
}

Tailwind CSS v4

@theme {
  --color-japanese-bonsai: #81a296;
  --color-japanese-bonsai-50: #eaf9f4;
  --color-japanese-bonsai-100: #dbede6;
  --color-japanese-bonsai-200: #c4dad2;
  --color-japanese-bonsai-300: #a3bfb5;
  --color-japanese-bonsai-400: #87a79b;
  --color-japanese-bonsai-500: #6b8f82;
  --color-japanese-bonsai-600: #5b796e;
  --color-japanese-bonsai-700: #496158;
  --color-japanese-bonsai-800: #354740;
  --color-japanese-bonsai-900: #24312c;
  --color-japanese-bonsai-950: #131d19;
}

SCSS

$japanese-bonsai: #81a296;
$japanese-bonsai-rgb: 129, 162, 150;
$japanese-bonsai-light: mix(#fff, $japanese-bonsai, 20%);
$japanese-bonsai-dark: mix(#000, $japanese-bonsai, 20%);

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