Blue Regent

CSS

:root {
  --blue-regent: #285991;
  --blue-regent-rgb: 40 89 145;
  --blue-regent-oklch: oklch(0.459 0.106 253.6);
}

.element {
  color: var(--blue-regent);
  background-color: hsl(212 57% 36%);
  border-color: oklch(0.459 0.106 253.6);
}

Tailwind CSS v4

@theme {
  --color-blue-regent: #285991;
  --color-blue-regent-50: #e2f7ff;
  --color-blue-regent-100: #d1eaff;
  --color-blue-regent-200: #b7d7ff;
  --color-blue-regent-300: #93baed;
  --color-blue-regent-400: #71a2dc;
  --color-blue-regent-500: #5189cb;
  --color-blue-regent-600: #4574ab;
  --color-blue-regent-700: #375d89;
  --color-blue-regent-800: #254466;
  --color-blue-regent-900: #192f48;
  --color-blue-regent-950: #091b2f;
}

SCSS

$blue-regent: #285991;
$blue-regent-rgb: 40, 89, 145;
$blue-regent-light: mix(#fff, $blue-regent, 20%);
$blue-regent-dark: mix(#000, $blue-regent, 20%);

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