#100519

CSS

:root {
  --glossy-black: #100519;
  --glossy-black-rgb: 16 5 25;
  --glossy-black-oklch: oklch(0.148 0.046 308.2);
}

.element {
  color: var(--glossy-black);
  background-color: hsl(273 67% 6%);
  border-color: oklch(0.148 0.046 308.2);
}

Tailwind CSS v4

@theme {
  --color-glossy-black: #100519;
  --color-glossy-black-50: #f9f2ff;
  --color-glossy-black-100: #ede4f4;
  --color-glossy-black-200: #dacfe3;
  --color-glossy-black-300: #bfb1c9;
  --color-glossy-black-400: #a698b4;
  --color-glossy-black-500: #8f7e9e;
  --color-glossy-black-600: #796b85;
  --color-glossy-black-700: #61566b;
  --color-glossy-black-800: #463e4f;
  --color-glossy-black-900: #312b37;
  --color-glossy-black-950: #1d1822;
}

SCSS

$glossy-black: #100519;
$glossy-black-rgb: 16, 5, 25;
$glossy-black-light: mix(#fff, $glossy-black, 20%);
$glossy-black-dark: mix(#000, $glossy-black, 20%);

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