Crow Black Blue

CSS

:root {
  --crow-black-blue: #112f4b;
  --crow-black-blue-rgb: 17 47 75;
  --crow-black-blue-oklch: oklch(0.298 0.062 249.3);
}

.element {
  color: var(--crow-black-blue);
  background-color: hsl(209 63% 18%);
  border-color: oklch(0.298 0.062 249.3);
}

Tailwind CSS v4

@theme {
  --color-crow-black-blue: #112f4b;
  --color-crow-black-blue-50: #e9f7ff;
  --color-crow-black-blue-100: #d9eafd;
  --color-crow-black-blue-200: #c1d7ef;
  --color-crow-black-blue-300: #a1bad7;
  --color-crow-black-blue-400: #82a2c2;
  --color-crow-black-blue-500: #668aae;
  --color-crow-black-blue-600: #577593;
  --color-crow-black-blue-700: #455d76;
  --color-crow-black-blue-800: #314557;
  --color-crow-black-blue-900: #212f3d;
  --color-crow-black-blue-950: #101c26;
}

SCSS

$crow-black-blue: #112f4b;
$crow-black-blue-rgb: 17, 47, 75;
$crow-black-blue-light: mix(#fff, $crow-black-blue, 20%);
$crow-black-blue-dark: mix(#000, $crow-black-blue, 20%);

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