Billycart Blue

CSS

:root {
  --billycart-blue: #4c77a4;
  --billycart-blue-rgb: 76 119 164;
  --billycart-blue-oklch: oklch(0.557 0.085 250.6);
}

.element {
  color: var(--billycart-blue);
  background-color: hsl(211 37% 47%);
  border-color: oklch(0.557 0.085 250.6);
}

Tailwind CSS v4

@theme {
  --color-billycart-blue: #4c77a4;
  --color-billycart-blue-50: #e4f7ff;
  --color-billycart-blue-100: #d4eaff;
  --color-billycart-blue-200: #bbd7f9;
  --color-billycart-blue-300: #99bbe3;
  --color-billycart-blue-400: #78a2cf;
  --color-billycart-blue-500: #598abd;
  --color-billycart-blue-600: #4c759f;
  --color-billycart-blue-700: #3d5d80;
  --color-billycart-blue-800: #2a455f;
  --color-billycart-blue-900: #1c3042;
  --color-billycart-blue-950: #0c1c2b;
}

SCSS

$billycart-blue: #4c77a4;
$billycart-blue-rgb: 76, 119, 164;
$billycart-blue-light: mix(#fff, $billycart-blue, 20%);
$billycart-blue-dark: mix(#000, $billycart-blue, 20%);

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