Asphalt Blue

CSS

:root {
  --asphalt-blue: #474c55;
  --asphalt-blue-rgb: 71 76 85;
  --asphalt-blue-oklch: oklch(0.415 0.016 262.3);
}

.element {
  color: var(--asphalt-blue);
  background-color: hsl(219 9% 31%);
  border-color: oklch(0.415 0.016 262.3);
}

Tailwind CSS v4

@theme {
  --color-asphalt-blue: #474c55;
  --color-asphalt-blue-50: #f3f5fa;
  --color-asphalt-blue-100: #e5e8ed;
  --color-asphalt-blue-200: #d1d4db;
  --color-asphalt-blue-300: #b3b7c0;
  --color-asphalt-blue-400: #999fa8;
  --color-asphalt-blue-500: #808691;
  --color-asphalt-blue-600: #6d727b;
  --color-asphalt-blue-700: #575b62;
  --color-asphalt-blue-800: #3f4348;
  --color-asphalt-blue-900: #2b2e32;
  --color-asphalt-blue-950: #191b1e;
}

SCSS

$asphalt-blue: #474c55;
$asphalt-blue-rgb: 71, 76, 85;
$asphalt-blue-light: mix(#fff, $asphalt-blue, 20%);
$asphalt-blue-dark: mix(#000, $asphalt-blue, 20%);

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