Dark Imperial Blue

CSS

:root {
  --dark-imperial-blue: #00416a;
  --dark-imperial-blue-rgb: 0 65 106;
  --dark-imperial-blue-oklch: oklch(0.363 0.091 245);
}

.element {
  color: var(--dark-imperial-blue);
  background-color: hsl(203 100% 21%);
  border-color: oklch(0.363 0.091 245);
}

Tailwind CSS v4

@theme {
  --color-dark-imperial-blue: #00416a;
  --color-dark-imperial-blue-50: #e1f8ff;
  --color-dark-imperial-blue-100: #d0ecff;
  --color-dark-imperial-blue-200: #b6d9fa;
  --color-dark-imperial-blue-300: #92bce4;
  --color-dark-imperial-blue-400: #6fa4d1;
  --color-dark-imperial-blue-500: #4e8cbf;
  --color-dark-imperial-blue-600: #4377a1;
  --color-dark-imperial-blue-700: #355f81;
  --color-dark-imperial-blue-800: #24465f;
  --color-dark-imperial-blue-900: #183043;
  --color-dark-imperial-blue-950: #081c2b;
}

SCSS

$dark-imperial-blue: #00416a;
$dark-imperial-blue-rgb: 0, 65, 106;
$dark-imperial-blue-light: mix(#fff, $dark-imperial-blue, 20%);
$dark-imperial-blue-dark: mix(#000, $dark-imperial-blue, 20%);

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