D. Darx Blue

CSS

:root {
  --d-darx-blue: #030764;
  --d-darx-blue-rgb: 3 7 100;
  --d-darx-blue-oklch: oklch(0.238 0.151 265.6);
}

.element {
  color: var(--d-darx-blue);
  background-color: hsl(238 94% 20%);
  border-color: oklch(0.238 0.151 265.6);
}

Tailwind CSS v4

@theme {
  --color-d-darx-blue: #030764;
  --color-d-darx-blue-50: #e2f5ff;
  --color-d-darx-blue-100: #d2e7ff;
  --color-d-darx-blue-200: #b8d3ff;
  --color-d-darx-blue-300: #96b4ff;
  --color-d-darx-blue-400: #749bf7;
  --color-d-darx-blue-500: #567fe9;
  --color-d-darx-blue-600: #496cc4;
  --color-d-darx-blue-700: #3a569e;
  --color-d-darx-blue-800: #264076;
  --color-d-darx-blue-900: #1a2c53;
  --color-d-darx-blue-950: #0a1938;
}

SCSS

$d-darx-blue: #030764;
$d-darx-blue-rgb: 3, 7, 100;
$d-darx-blue-light: mix(#fff, $d-darx-blue, 20%);
$d-darx-blue-dark: mix(#000, $d-darx-blue, 20%);

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