#282C2A

CSS

:root {
  --bitter-liquorice: #282c2a;
  --bitter-liquorice-rgb: 40 44 42;
  --bitter-liquorice-oklch: oklch(0.288 0.007 164.5);
}

.element {
  color: var(--bitter-liquorice);
  background-color: hsl(150 5% 16%);
  border-color: oklch(0.288 0.007 164.5);
}

Tailwind CSS v4

@theme {
  --color-bitter-liquorice: #282c2a;
  --color-bitter-liquorice-50: #f3f6f5;
  --color-bitter-liquorice-100: #e6e8e7;
  --color-bitter-liquorice-200: #d2d5d3;
  --color-bitter-liquorice-300: #b4b8b6;
  --color-bitter-liquorice-400: #9ba09d;
  --color-bitter-liquorice-500: #828885;
  --color-bitter-liquorice-600: #6e7370;
  --color-bitter-liquorice-700: #585c5a;
  --color-bitter-liquorice-800: #404342;
  --color-bitter-liquorice-900: #2c2e2d;
  --color-bitter-liquorice-950: #191b1a;
}

SCSS

$bitter-liquorice: #282c2a;
$bitter-liquorice-rgb: 40, 44, 42;
$bitter-liquorice-light: mix(#fff, $bitter-liquorice, 20%);
$bitter-liquorice-dark: mix(#000, $bitter-liquorice, 20%);

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