Madder Blue

CSS

:root {
  --madder-blue: #b5b6ce;
  --madder-blue-rgb: 181 182 206;
  --madder-blue-oklch: oklch(0.783 0.034 283.7);
}

.element {
  color: var(--madder-blue);
  background-color: hsl(238 20% 76%);
  border-color: oklch(0.783 0.034 283.7);
}

Tailwind CSS v4

@theme {
  --color-madder-blue: #b5b6ce;
  --color-madder-blue-50: #f4f4ff;
  --color-madder-blue-100: #e6e6f3;
  --color-madder-blue-200: #d2d2e3;
  --color-madder-blue-300: #b5b5c9;
  --color-madder-blue-400: #9b9cb2;
  --color-madder-blue-500: #83849c;
  --color-madder-blue-600: #6f6f84;
  --color-madder-blue-700: #58596a;
  --color-madder-blue-800: #40414e;
  --color-madder-blue-900: #2c2d36;
  --color-madder-blue-950: #191a21;
}

SCSS

$madder-blue: #b5b6ce;
$madder-blue-rgb: 181, 182, 206;
$madder-blue-light: mix(#fff, $madder-blue, 20%);
$madder-blue-dark: mix(#000, $madder-blue, 20%);

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