Blue Fir

CSS

:root {
  --blue-fir: #51645f;
  --blue-fir-rgb: 81 100 95;
  --blue-fir-oklch: oklch(0.486 0.024 177.5);
}

.element {
  color: var(--blue-fir);
  background-color: hsl(164 10% 35%);
  border-color: oklch(0.486 0.024 177.5);
}

Tailwind CSS v4

@theme {
  --color-blue-fir: #51645f;
  --color-blue-fir-50: #eef8f5;
  --color-blue-fir-100: #e0ebe8;
  --color-blue-fir-200: #cad8d4;
  --color-blue-fir-300: #abbcb8;
  --color-blue-fir-400: #90a39e;
  --color-blue-fir-500: #768c86;
  --color-blue-fir-600: #647671;
  --color-blue-fir-700: #505f5b;
  --color-blue-fir-800: #3a4542;
  --color-blue-fir-900: #28302d;
  --color-blue-fir-950: #161c1a;
}

SCSS

$blue-fir: #51645f;
$blue-fir-rgb: 81, 100, 95;
$blue-fir-light: mix(#fff, $blue-fir, 20%);
$blue-fir-dark: mix(#000, $blue-fir, 20%);

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