China Blue

CSS

:root {
  --china-blue: #5a6c80;
  --china-blue-rgb: 90 108 128;
  --china-blue-oklch: oklch(0.524 0.038 251.3);
}

.element {
  color: var(--china-blue);
  background-color: hsl(212 17% 43%);
  border-color: oklch(0.524 0.038 251.3);
}

Tailwind CSS v4

@theme {
  --color-china-blue: #5a6c80;
  --color-china-blue-50: #eef6ff;
  --color-china-blue-100: #dfe9f5;
  --color-china-blue-200: #c9d6e5;
  --color-china-blue-300: #aab9cb;
  --color-china-blue-400: #8ea1b5;
  --color-china-blue-500: #74889f;
  --color-china-blue-600: #627387;
  --color-china-blue-700: #4e5c6c;
  --color-china-blue-800: #38444f;
  --color-china-blue-900: #272f37;
  --color-china-blue-950: #151b22;
}

SCSS

$china-blue: #5a6c80;
$china-blue-rgb: 90, 108, 128;
$china-blue-light: mix(#fff, $china-blue, 20%);
$china-blue-dark: mix(#000, $china-blue, 20%);

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