Ruri Blue

CSS

:root {
  --ruri-blue: #1e50a2;
  --ruri-blue-rgb: 30 80 162;
  --ruri-blue-oklch: oklch(0.446 0.143 259.9);
}

.element {
  color: var(--ruri-blue);
  background-color: hsl(217 69% 38%);
  border-color: oklch(0.446 0.143 259.9);
}

Tailwind CSS v4

@theme {
  --color-ruri-blue: #1e50a2;
  --color-ruri-blue-50: #dff6ff;
  --color-ruri-blue-100: #cee9ff;
  --color-ruri-blue-200: #b3d5ff;
  --color-ruri-blue-300: #8fb7ff;
  --color-ruri-blue-400: #6b9ef2;
  --color-ruri-blue-500: #4a84e4;
  --color-ruri-blue-600: #3f70c0;
  --color-ruri-blue-700: #32599a;
  --color-ruri-blue-800: #204273;
  --color-ruri-blue-900: #152d51;
  --color-ruri-blue-950: #071a36;
}

SCSS

$ruri-blue: #1e50a2;
$ruri-blue-rgb: 30, 80, 162;
$ruri-blue-light: mix(#fff, $ruri-blue, 20%);
$ruri-blue-dark: mix(#000, $ruri-blue, 20%);

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