Twinkle Blue

CSS

:root {
  --twinkle-blue: #d0d7df;
  --twinkle-blue-rgb: 208 215 223;
  --twinkle-blue-oklch: oklch(0.876 0.013 251.6);
}

.element {
  color: var(--twinkle-blue);
  background-color: hsl(212 19% 85%);
  border-color: oklch(0.876 0.013 251.6);
}

Tailwind CSS v4

@theme {
  --color-twinkle-blue: #d0d7df;
  --color-twinkle-blue-50: #f2f5f9;
  --color-twinkle-blue-100: #e5e8ec;
  --color-twinkle-blue-200: #d0d5da;
  --color-twinkle-blue-300: #b3b8be;
  --color-twinkle-blue-400: #999fa6;
  --color-twinkle-blue-500: #80878f;
  --color-twinkle-blue-600: #6c7279;
  --color-twinkle-blue-700: #575b61;
  --color-twinkle-blue-800: #3f4347;
  --color-twinkle-blue-900: #2b2e31;
  --color-twinkle-blue-950: #191b1d;
}

SCSS

$twinkle-blue: #d0d7df;
$twinkle-blue-rgb: 208, 215, 223;
$twinkle-blue-light: mix(#fff, $twinkle-blue, 20%);
$twinkle-blue-dark: mix(#000, $twinkle-blue, 20%);

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