Cold Steel

CSS

:root {
  --cold-steel: #262335;
  --cold-steel-rgb: 38 35 53;
  --cold-steel-oklch: oklch(0.268 0.033 291.6);
}

.element {
  color: var(--cold-steel);
  background-color: hsl(250 20% 17%);
  border-color: oklch(0.268 0.033 291.6);
}

Tailwind CSS v4

@theme {
  --color-cold-steel: #262335;
  --color-cold-steel-50: #f5f3fe;
  --color-cold-steel-100: #e8e6f2;
  --color-cold-steel-200: #d4d2e2;
  --color-cold-steel-300: #b8b4c7;
  --color-cold-steel-400: #9e9bb1;
  --color-cold-steel-500: #86839b;
  --color-cold-steel-600: #716f83;
  --color-cold-steel-700: #5b5869;
  --color-cold-steel-800: #42414d;
  --color-cold-steel-900: #2d2d36;
  --color-cold-steel-950: #1a1a21;
}

SCSS

$cold-steel: #262335;
$cold-steel-rgb: 38, 35, 53;
$cold-steel-light: mix(#fff, $cold-steel, 20%);
$cold-steel-dark: mix(#000, $cold-steel, 20%);

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