Neptune Blue

CSS

:root {
  --neptune-blue: #2e5d9d;
  --neptune-blue-rgb: 46 93 157;
  --neptune-blue-oklch: oklch(0.478 0.116 256.8);
}

.element {
  color: var(--neptune-blue);
  background-color: hsl(215 55% 40%);
  border-color: oklch(0.478 0.116 256.8);
}

Tailwind CSS v4

@theme {
  --color-neptune-blue: #2e5d9d;
  --color-neptune-blue-50: #e2f7ff;
  --color-neptune-blue-100: #d1eaff;
  --color-neptune-blue-200: #b7d6ff;
  --color-neptune-blue-300: #93b9f3;
  --color-neptune-blue-400: #71a0e2;
  --color-neptune-blue-500: #5187d2;
  --color-neptune-blue-600: #4572b1;
  --color-neptune-blue-700: #375c8e;
  --color-neptune-blue-800: #25436a;
  --color-neptune-blue-900: #182f4a;
  --color-neptune-blue-950: #091b31;
}

SCSS

$neptune-blue: #2e5d9d;
$neptune-blue-rgb: 46, 93, 157;
$neptune-blue-light: mix(#fff, $neptune-blue, 20%);
$neptune-blue-dark: mix(#000, $neptune-blue, 20%);

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