#477094

CSS

:root {
  --naval: #477094;
  --naval-rgb: 71 112 148;
  --naval-oklch: oklch(0.53 0.073 246.2);
}

.element {
  color: var(--naval);
  background-color: hsl(208 35% 43%);
  border-color: oklch(0.53 0.073 246.2);
}

Tailwind CSS v4

@theme {
  --color-naval: #477094;
  --color-naval-50: #e5f8ff;
  --color-naval-100: #d5ebff;
  --color-naval-200: #bcd8f3;
  --color-naval-300: #9abbdc;
  --color-naval-400: #7ba3c8;
  --color-naval-500: #5c8bb4;
  --color-naval-600: #4f7698;
  --color-naval-700: #3f5e7a;
  --color-naval-800: #2c455a;
  --color-naval-900: #1d303f;
  --color-naval-950: #0d1c28;
}

SCSS

$naval: #477094;
$naval-rgb: 71, 112, 148;
$naval-light: mix(#fff, $naval, 20%);
$naval-dark: mix(#000, $naval, 20%);

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