Constellation Blue

CSS

:root {
  --constellation-blue: #3c4670;
  --constellation-blue-rgb: 60 70 112;
  --constellation-blue-oklch: oklch(0.405 0.072 272.7);
}

.element {
  color: var(--constellation-blue);
  background-color: hsl(228 30% 34%);
  border-color: oklch(0.405 0.072 272.7);
}

Tailwind CSS v4

@theme {
  --color-constellation-blue: #3c4670;
  --color-constellation-blue-50: #eff4ff;
  --color-constellation-blue-100: #e0e7ff;
  --color-constellation-blue-200: #cbd3f4;
  --color-constellation-blue-300: #acb5dd;
  --color-constellation-blue-400: #909cca;
  --color-constellation-blue-500: #7683b6;
  --color-constellation-blue-600: #646f9a;
  --color-constellation-blue-700: #50597c;
  --color-constellation-blue-800: #39415c;
  --color-constellation-blue-900: #272d40;
  --color-constellation-blue-950: #151a29;
}

SCSS

$constellation-blue: #3c4670;
$constellation-blue-rgb: 60, 70, 112;
$constellation-blue-light: mix(#fff, $constellation-blue, 20%);
$constellation-blue-dark: mix(#000, $constellation-blue, 20%);

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