Dark Engine

CSS

:root {
  --dark-engine: #3e3f41;
  --dark-engine-rgb: 62 63 65;
  --dark-engine-oklch: oklch(0.367 0.004 264.5);
}

.element {
  color: var(--dark-engine);
  background-color: hsl(220 2% 25%);
  border-color: oklch(0.367 0.004 264.5);
}

Tailwind CSS v4

@theme {
  --color-dark-engine: #3e3f41;
  --color-dark-engine-50: #f4f5f6;
  --color-dark-engine-100: #e7e8e9;
  --color-dark-engine-200: #d3d4d6;
  --color-dark-engine-300: #b6b7b9;
  --color-dark-engine-400: #9d9ea1;
  --color-dark-engine-500: #858689;
  --color-dark-engine-600: #707174;
  --color-dark-engine-700: #5a5b5c;
  --color-dark-engine-800: #424244;
  --color-dark-engine-900: #2d2e2f;
  --color-dark-engine-950: #1a1b1b;
}

SCSS

$dark-engine: #3e3f41;
$dark-engine-rgb: 62, 63, 65;
$dark-engine-light: mix(#fff, $dark-engine, 20%);
$dark-engine-dark: mix(#000, $dark-engine, 20%);

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