Navy Dark Blue

CSS

:root {
  --navy-dark-blue: #004c6a;
  --navy-dark-blue-rgb: 0 76 106;
  --navy-dark-blue-oklch: oklch(0.392 0.081 233.4);
}

.element {
  color: var(--navy-dark-blue);
  background-color: hsl(197 100% 21%);
  border-color: oklch(0.392 0.081 233.4);
}

Tailwind CSS v4

@theme {
  --color-navy-dark-blue: #004c6a;
  --color-navy-dark-blue-50: #e0faff;
  --color-navy-dark-blue-100: #cfedff;
  --color-navy-dark-blue-200: #b4dbf3;
  --color-navy-dark-blue-300: #8fbfdc;
  --color-navy-dark-blue-400: #6ca7c7;
  --color-navy-dark-blue-500: #498fb4;
  --color-navy-dark-blue-600: #3f7998;
  --color-navy-dark-blue-700: #32617a;
  --color-navy-dark-blue-800: #22475a;
  --color-navy-dark-blue-900: #16313f;
  --color-navy-dark-blue-950: #071d28;
}

SCSS

$navy-dark-blue: #004c6a;
$navy-dark-blue-rgb: 0, 76, 106;
$navy-dark-blue-light: mix(#fff, $navy-dark-blue, 20%);
$navy-dark-blue-dark: mix(#000, $navy-dark-blue, 20%);

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