Celtic Blue

CSS

:root {
  --celtic-blue: #246bce;
  --celtic-blue-rgb: 36 107 206;
  --celtic-blue-oklch: oklch(0.54 0.169 257.9);
}

.element {
  color: var(--celtic-blue);
  background-color: hsl(215 70% 47%);
  border-color: oklch(0.54 0.169 257.9);
}

Tailwind CSS v4

@theme {
  --color-celtic-blue: #246bce;
  --color-celtic-blue-50: #d9f7ff;
  --color-celtic-blue-100: #c7eaff;
  --color-celtic-blue-200: #aad6ff;
  --color-celtic-blue-300: #84b8ff;
  --color-celtic-blue-400: #5b9eff;
  --color-celtic-blue-500: #3383f3;
  --color-celtic-blue-600: #2d6fcd;
  --color-celtic-blue-700: #2459a5;
  --color-celtic-blue-800: #13417b;
  --color-celtic-blue-900: #0c2d57;
  --color-celtic-blue-950: #011a3b;
}

SCSS

$celtic-blue: #246bce;
$celtic-blue-rgb: 36, 107, 206;
$celtic-blue-light: mix(#fff, $celtic-blue, 20%);
$celtic-blue-dark: mix(#000, $celtic-blue, 20%);

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