Signature Blue

CSS

:root {
  --signature-blue: #455371;
  --signature-blue-rgb: 69 83 113;
  --signature-blue-oklch: oklch(0.443 0.053 265);
}

.element {
  color: var(--signature-blue);
  background-color: hsl(221 24% 36%);
  border-color: oklch(0.443 0.053 265);
}

Tailwind CSS v4

@theme {
  --color-signature-blue: #455371;
  --color-signature-blue-50: #eef5ff;
  --color-signature-blue-100: #e0e8fa;
  --color-signature-blue-200: #cad4ec;
  --color-signature-blue-300: #abb7d3;
  --color-signature-blue-400: #8f9fbe;
  --color-signature-blue-500: #7586aa;
  --color-signature-blue-600: #637190;
  --color-signature-blue-700: #4f5b73;
  --color-signature-blue-800: #394355;
  --color-signature-blue-900: #272e3b;
  --color-signature-blue-950: #151b25;
}

SCSS

$signature-blue: #455371;
$signature-blue-rgb: 69, 83, 113;
$signature-blue-light: mix(#fff, $signature-blue, 20%);
$signature-blue-dark: mix(#000, $signature-blue, 20%);

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