Blue Ash

CSS

:root {
  --blue-ash: #414654;
  --blue-ash-rgb: 65 70 84;
  --blue-ash-oklch: oklch(0.395 0.025 269.8);
}

.element {
  color: var(--blue-ash);
  background-color: hsl(224 13% 29%);
  border-color: oklch(0.395 0.025 269.8);
}

Tailwind CSS v4

@theme {
  --color-blue-ash: #414654;
  --color-blue-ash-50: #f2f5fc;
  --color-blue-ash-100: #e5e8f0;
  --color-blue-ash-200: #d0d4df;
  --color-blue-ash-300: #b3b7c4;
  --color-blue-ash-400: #989ead;
  --color-blue-ash-500: #808697;
  --color-blue-ash-600: #6c7180;
  --color-blue-ash-700: #565b66;
  --color-blue-ash-800: #3f424b;
  --color-blue-ash-900: #2b2e34;
  --color-blue-ash-950: #181b20;
}

SCSS

$blue-ash: #414654;
$blue-ash-rgb: 65, 70, 84;
$blue-ash-light: mix(#fff, $blue-ash, 20%);
$blue-ash-dark: mix(#000, $blue-ash, 20%);

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