Arctic Nights

CSS

:root {
  --arctic-nights: #345c61;
  --arctic-nights-rgb: 52 92 97;
  --arctic-nights-oklch: oklch(0.447 0.046 205.9);
}

.element {
  color: var(--arctic-nights);
  background-color: hsl(187 30% 29%);
  border-color: oklch(0.447 0.046 205.9);
}

Tailwind CSS v4

@theme {
  --color-arctic-nights: #345c61;
  --color-arctic-nights-50: #e7f9fc;
  --color-arctic-nights-100: #d7edf0;
  --color-arctic-nights-200: #bfdade;
  --color-arctic-nights-300: #9dbec4;
  --color-arctic-nights-400: #7fa7ac;
  --color-arctic-nights-500: #618f95;
  --color-arctic-nights-600: #53797e;
  --color-arctic-nights-700: #426165;
  --color-arctic-nights-800: #2f474a;
  --color-arctic-nights-900: #203133;
  --color-arctic-nights-950: #0f1d1f;
}

SCSS

$arctic-nights: #345c61;
$arctic-nights-rgb: 52, 92, 97;
$arctic-nights-light: mix(#fff, $arctic-nights, 20%);
$arctic-nights-dark: mix(#000, $arctic-nights, 20%);

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