Black Tortoise

CSS

:root {
  --black-tortoise: #353235;
  --black-tortoise-rgb: 53 50 53;
  --black-tortoise-oklch: oklch(0.321 0.007 325.7);
}

.element {
  color: var(--black-tortoise);
  background-color: hsl(300 3% 20%);
  border-color: oklch(0.321 0.007 325.7);
}

Tailwind CSS v4

@theme {
  --color-black-tortoise: #353235;
  --color-black-tortoise-50: #f6f4f6;
  --color-black-tortoise-100: #e9e7e9;
  --color-black-tortoise-200: #d6d3d6;
  --color-black-tortoise-300: #b9b6b9;
  --color-black-tortoise-400: #a09da0;
  --color-black-tortoise-500: #898588;
  --color-black-tortoise-600: #747074;
  --color-black-tortoise-700: #5c5a5c;
  --color-black-tortoise-800: #434244;
  --color-black-tortoise-900: #2f2d2f;
  --color-black-tortoise-950: #1b1a1b;
}

SCSS

$black-tortoise: #353235;
$black-tortoise-rgb: 53, 50, 53;
$black-tortoise-light: mix(#fff, $black-tortoise, 20%);
$black-tortoise-dark: mix(#000, $black-tortoise, 20%);

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