Blue Lagoon

CSS

:root {
  --blue-lagoon: #00626f;
  --blue-lagoon-rgb: 0 98 111;
  --blue-lagoon-oklch: oklch(0.455 0.079 210.5);
}

.element {
  color: var(--blue-lagoon);
  background-color: hsl(187 100% 22%);
  border-color: oklch(0.455 0.079 210.5);
}

Tailwind CSS v4

@theme {
  --color-blue-lagoon: #00626f;
  --color-blue-lagoon-50: #ddfcff;
  --color-blue-lagoon-100: #cbeff7;
  --color-blue-lagoon-200: #aedee8;
  --color-blue-lagoon-300: #88c3cf;
  --color-blue-lagoon-400: #63abb8;
  --color-blue-lagoon-500: #3b94a3;
  --color-blue-lagoon-600: #337d8a;
  --color-blue-lagoon-700: #29646f;
  --color-blue-lagoon-800: #1b4a51;
  --color-blue-lagoon-900: #123338;
  --color-blue-lagoon-950: #041f23;
}

SCSS

$blue-lagoon: #00626f;
$blue-lagoon-rgb: 0, 98, 111;
$blue-lagoon-light: mix(#fff, $blue-lagoon, 20%);
$blue-lagoon-dark: mix(#000, $blue-lagoon, 20%);

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