Rush Hour

CSS

:root {
  --rush-hour: #536770;
  --rush-hour-rgb: 83 103 112;
  --rush-hour-oklch: oklch(0.501 0.028 227);
}

.element {
  color: var(--rush-hour);
  background-color: hsl(199 15% 38%);
  border-color: oklch(0.501 0.028 227);
}

Tailwind CSS v4

@theme {
  --color-rush-hour: #536770;
  --color-rush-hour-50: #edf7fc;
  --color-rush-hour-100: #dfeaef;
  --color-rush-hour-200: #c9d7de;
  --color-rush-hour-300: #a9bac3;
  --color-rush-hour-400: #8ea2ab;
  --color-rush-hour-500: #738a95;
  --color-rush-hour-600: #62757e;
  --color-rush-hour-700: #4e5e65;
  --color-rush-hour-800: #38454a;
  --color-rush-hour-900: #272f33;
  --color-rush-hour-950: #151c1f;
}

SCSS

$rush-hour: #536770;
$rush-hour-rgb: 83, 103, 112;
$rush-hour-light: mix(#fff, $rush-hour, 20%);
$rush-hour-dark: mix(#000, $rush-hour, 20%);

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