Blue Dusk

CSS

:root {
  --blue-dusk: #8c959d;
  --blue-dusk-rgb: 140 149 157;
  --blue-dusk-oklch: oklch(0.665 0.016 244.8);
}

.element {
  color: var(--blue-dusk);
  background-color: hsl(208 8% 58%);
  border-color: oklch(0.665 0.016 244.8);
}

Tailwind CSS v4

@theme {
  --color-blue-dusk: #8c959d;
  --color-blue-dusk-50: #f2f6f9;
  --color-blue-dusk-100: #e4e8ed;
  --color-blue-dusk-200: #cfd5db;
  --color-blue-dusk-300: #b1b8bf;
  --color-blue-dusk-400: #97a0a7;
  --color-blue-dusk-500: #7e8890;
  --color-blue-dusk-600: #6b737a;
  --color-blue-dusk-700: #555c62;
  --color-blue-dusk-800: #3e4347;
  --color-blue-dusk-900: #2a2e32;
  --color-blue-dusk-950: #181b1d;
}

SCSS

$blue-dusk: #8c959d;
$blue-dusk-rgb: 140, 149, 157;
$blue-dusk-light: mix(#fff, $blue-dusk, 20%);
$blue-dusk-dark: mix(#000, $blue-dusk, 20%);

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