#446F99

CSS

:root {
  --naval: #446f99;
  --naval-rgb: 68 111 153;
  --naval-oklch: oklch(0.529 0.082 249.1);
}

.element {
  color: var(--naval);
  background-color: hsl(210 38% 43%);
  border-color: oklch(0.529 0.082 249.1);
}

Tailwind CSS v4

@theme {
  --color-naval: #446f99;
  --color-naval-50: #e4f7ff;
  --color-naval-100: #d4ebff;
  --color-naval-200: #bbd7f7;
  --color-naval-300: #99bbe1;
  --color-naval-400: #78a3cd;
  --color-naval-500: #5a8aba;
  --color-naval-600: #4c759d;
  --color-naval-700: #3d5e7e;
  --color-naval-800: #2a455d;
  --color-naval-900: #1c3041;
  --color-naval-950: #0c1c2a;
}

SCSS

$naval: #446f99;
$naval-rgb: 68, 111, 153;
$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);
}