Sapphire Stone

CSS

:root {
  --sapphire-stone: #41495d;
  --sapphire-stone-rgb: 65 73 93;
  --sapphire-stone-oklch: oklch(0.406 0.035 267.8);
}

.element {
  color: var(--sapphire-stone);
  background-color: hsl(223 18% 31%);
  border-color: oklch(0.406 0.035 267.8);
}

Tailwind CSS v4

@theme {
  --color-sapphire-stone: #41495d;
  --color-sapphire-stone-50: #f1f5ff;
  --color-sapphire-stone-100: #e3e8f4;
  --color-sapphire-stone-200: #ced4e4;
  --color-sapphire-stone-300: #b0b7ca;
  --color-sapphire-stone-400: #959eb4;
  --color-sapphire-stone-500: #7c869e;
  --color-sapphire-stone-600: #697186;
  --color-sapphire-stone-700: #545b6b;
  --color-sapphire-stone-800: #3d424f;
  --color-sapphire-stone-900: #2a2e37;
  --color-sapphire-stone-950: #171b22;
}

SCSS

$sapphire-stone: #41495d;
$sapphire-stone-rgb: 65, 73, 93;
$sapphire-stone-light: mix(#fff, $sapphire-stone, 20%);
$sapphire-stone-dark: mix(#000, $sapphire-stone, 20%);

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