Dark Kettle Black

CSS

:root {
  --dark-kettle-black: #333438;
  --dark-kettle-black-rgb: 51 52 56;
  --dark-kettle-black-oklch: oklch(0.326 0.007 274.8);
}

.element {
  color: var(--dark-kettle-black);
  background-color: hsl(228 5% 21%);
  border-color: oklch(0.326 0.007 274.8);
}

Tailwind CSS v4

@theme {
  --color-dark-kettle-black: #333438;
  --color-dark-kettle-black-50: #f4f5f7;
  --color-dark-kettle-black-100: #e7e8ea;
  --color-dark-kettle-black-200: #d3d4d7;
  --color-dark-kettle-black-300: #b6b7bb;
  --color-dark-kettle-black-400: #9d9ea3;
  --color-dark-kettle-black-500: #85868b;
  --color-dark-kettle-black-600: #707176;
  --color-dark-kettle-black-700: #5a5b5e;
  --color-dark-kettle-black-800: #414245;
  --color-dark-kettle-black-900: #2d2e30;
  --color-dark-kettle-black-950: #1a1a1c;
}

SCSS

$dark-kettle-black: #333438;
$dark-kettle-black-rgb: 51, 52, 56;
$dark-kettle-black-light: mix(#fff, $dark-kettle-black, 20%);
$dark-kettle-black-dark: mix(#000, $dark-kettle-black, 20%);

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