Blue Chalk

CSS

:root {
  --blue-chalk: #94c0cc;
  --blue-chalk-rgb: 148 192 204;
  --blue-chalk-oklch: oklch(0.78 0.05 216.3);
}

.element {
  color: var(--blue-chalk);
  background-color: hsl(193 35% 69%);
  border-color: oklch(0.78 0.05 216.3);
}

Tailwind CSS v4

@theme {
  --color-blue-chalk: #94c0cc;
  --color-blue-chalk-50: #e6f9ff;
  --color-blue-chalk-100: #d7ecf3;
  --color-blue-chalk-200: #bedae3;
  --color-blue-chalk-300: #9cbec9;
  --color-blue-chalk-400: #7da6b1;
  --color-blue-chalk-500: #5f8f9b;
  --color-blue-chalk-600: #517983;
  --color-blue-chalk-700: #416169;
  --color-blue-chalk-800: #2e474d;
  --color-blue-chalk-900: #1f3135;
  --color-blue-chalk-950: #0f1d21;
}

SCSS

$blue-chalk: #94c0cc;
$blue-chalk-rgb: 148, 192, 204;
$blue-chalk-light: mix(#fff, $blue-chalk, 20%);
$blue-chalk-dark: mix(#000, $blue-chalk, 20%);

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