Zen Blue

CSS

:root {
  --zen-blue: #99a4ba;
  --zen-blue-rgb: 153 164 186;
  --zen-blue-oklch: oklch(0.717 0.034 264.3);
}

.element {
  color: var(--zen-blue);
  background-color: hsl(220 19% 66%);
  border-color: oklch(0.717 0.034 264.3);
}

Tailwind CSS v4

@theme {
  --color-zen-blue: #99a4ba;
  --color-zen-blue-50: #f0f5ff;
  --color-zen-blue-100: #e2e8f4;
  --color-zen-blue-200: #cdd4e4;
  --color-zen-blue-300: #afb7ca;
  --color-zen-blue-400: #949fb3;
  --color-zen-blue-500: #7b869e;
  --color-zen-blue-600: #687285;
  --color-zen-blue-700: #535b6b;
  --color-zen-blue-800: #3c434f;
  --color-zen-blue-900: #292e37;
  --color-zen-blue-950: #171b22;
}

SCSS

$zen-blue: #99a4ba;
$zen-blue-rgb: 153, 164, 186;
$zen-blue-light: mix(#fff, $zen-blue, 20%);
$zen-blue-dark: mix(#000, $zen-blue, 20%);

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