Good Night!

CSS

:root {
  --good-night: #46565f;
  --good-night-rgb: 70 86 95;
  --good-night-oklch: oklch(0.443 0.025 232.7);
}

.element {
  color: var(--good-night);
  background-color: hsl(202 15% 32%);
  border-color: oklch(0.443 0.025 232.7);
}

Tailwind CSS v4

@theme {
  --color-good-night: #46565f;
  --color-good-night-50: #eff6fb;
  --color-good-night-100: #e0e9ef;
  --color-good-night-200: #cbd6dd;
  --color-good-night-300: #acbac2;
  --color-good-night-400: #91a1ab;
  --color-good-night-500: #768994;
  --color-good-night-600: #64747d;
  --color-good-night-700: #505d64;
  --color-good-night-800: #3a4449;
  --color-good-night-900: #282f33;
  --color-good-night-950: #161c1f;
}

SCSS

$good-night: #46565f;
$good-night-rgb: 70, 86, 95;
$good-night-light: mix(#fff, $good-night, 20%);
$good-night-dark: mix(#000, $good-night, 20%);

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