Spectrum Blue

CSS

:root {
  --spectrum-blue: #44448d;
  --spectrum-blue-rgb: 68 68 141;
  --spectrum-blue-oklch: oklch(0.426 0.118 280.2);
}

.element {
  color: var(--spectrum-blue);
  background-color: hsl(240 35% 41%);
  border-color: oklch(0.426 0.118 280.2);
}

Tailwind CSS v4

@theme {
  --color-spectrum-blue: #44448d;
  --color-spectrum-blue-50: #eff2ff;
  --color-spectrum-blue-100: #e1e4ff;
  --color-spectrum-blue-200: #cccfff;
  --color-spectrum-blue-300: #aeb0f3;
  --color-spectrum-blue-400: #9196e3;
  --color-spectrum-blue-500: #787bd2;
  --color-spectrum-blue-600: #6669b1;
  --color-spectrum-blue-700: #51548e;
  --color-spectrum-blue-800: #393d6a;
  --color-spectrum-blue-900: #272a4b;
  --color-spectrum-blue-950: #161731;
}

SCSS

$spectrum-blue: #44448d;
$spectrum-blue-rgb: 68, 68, 141;
$spectrum-blue-light: mix(#fff, $spectrum-blue, 20%);
$spectrum-blue-dark: mix(#000, $spectrum-blue, 20%);

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