#616F6F

CSS

:root {
  --wrapped-in-twilight: #616f6f;
  --wrapped-in-twilight-rgb: 97 111 111;
  --wrapped-in-twilight-oklch: oklch(0.53 0.017 196.7);
}

.element {
  color: var(--wrapped-in-twilight);
  background-color: hsl(180 7% 41%);
  border-color: oklch(0.53 0.017 196.7);
}

Tailwind CSS v4

@theme {
  --color-wrapped-in-twilight: #616f6f;
  --color-wrapped-in-twilight-50: #f0f7f7;
  --color-wrapped-in-twilight-100: #e2eaea;
  --color-wrapped-in-twilight-200: #ccd7d7;
  --color-wrapped-in-twilight-300: #aebaba;
  --color-wrapped-in-twilight-400: #94a2a2;
  --color-wrapped-in-twilight-500: #7a8a8a;
  --color-wrapped-in-twilight-600: #677575;
  --color-wrapped-in-twilight-700: #525d5d;
  --color-wrapped-in-twilight-800: #3c4444;
  --color-wrapped-in-twilight-900: #292f2f;
  --color-wrapped-in-twilight-950: #171c1c;
}

SCSS

$wrapped-in-twilight: #616f6f;
$wrapped-in-twilight-rgb: 97, 111, 111;
$wrapped-in-twilight-light: mix(#fff, $wrapped-in-twilight, 20%);
$wrapped-in-twilight-dark: mix(#000, $wrapped-in-twilight, 20%);

.element {
  color: $wrapped-in-twilight;
  box-shadow: 0 0 0 2px rgba($wrapped-in-twilight, 0.35);
}