Ensign Blue

CSS

:root {
  --ensign-blue: #3c4f6e;
  --ensign-blue-rgb: 60 79 110;
  --ensign-blue-oklch: oklch(0.425 0.057 260);
}

.element {
  color: var(--ensign-blue);
  background-color: hsl(217 29% 33%);
  border-color: oklch(0.425 0.057 260);
}

Tailwind CSS v4

@theme {
  --color-ensign-blue: #3c4f6e;
  --color-ensign-blue-50: #ecf6ff;
  --color-ensign-blue-100: #dee8fc;
  --color-ensign-blue-200: #c7d5ed;
  --color-ensign-blue-300: #a8b8d5;
  --color-ensign-blue-400: #8ba0c1;
  --color-ensign-blue-500: #7087ad;
  --color-ensign-blue-600: #5f7292;
  --color-ensign-blue-700: #4c5b75;
  --color-ensign-blue-800: #364356;
  --color-ensign-blue-900: #252e3c;
  --color-ensign-blue-950: #141b26;
}

SCSS

$ensign-blue: #3c4f6e;
$ensign-blue-rgb: 60, 79, 110;
$ensign-blue-light: mix(#fff, $ensign-blue, 20%);
$ensign-blue-dark: mix(#000, $ensign-blue, 20%);

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