Tempest in a Teapot

CSS

:root {
  --tempest-in-a-teapot: #303a40;
  --tempest-in-a-teapot-rgb: 48 58 64;
  --tempest-in-a-teapot-oklch: oklch(0.342 0.017 234.3);
}

.element {
  color: var(--tempest-in-a-teapot);
  background-color: hsl(203 14% 22%);
  border-color: oklch(0.342 0.017 234.3);
}

Tailwind CSS v4

@theme {
  --color-tempest-in-a-teapot: #303a40;
  --color-tempest-in-a-teapot-50: #f1f6f9;
  --color-tempest-in-a-teapot-100: #e3e9ed;
  --color-tempest-in-a-teapot-200: #ced5db;
  --color-tempest-in-a-teapot-300: #b0b9bf;
  --color-tempest-in-a-teapot-400: #95a0a7;
  --color-tempest-in-a-teapot-500: #7c8890;
  --color-tempest-in-a-teapot-600: #69737a;
  --color-tempest-in-a-teapot-700: #545c61;
  --color-tempest-in-a-teapot-800: #3d4447;
  --color-tempest-in-a-teapot-900: #2a2f31;
  --color-tempest-in-a-teapot-950: #171b1d;
}

SCSS

$tempest-in-a-teapot: #303a40;
$tempest-in-a-teapot-rgb: 48, 58, 64;
$tempest-in-a-teapot-light: mix(#fff, $tempest-in-a-teapot, 20%);
$tempest-in-a-teapot-dark: mix(#000, $tempest-in-a-teapot, 20%);

.element {
  color: $tempest-in-a-teapot;
  box-shadow: 0 0 0 2px rgba($tempest-in-a-teapot, 0.35);
}