#5B706E

CSS

:root {
  --wrapped-in-twilight: #5b706e;
  --wrapped-in-twilight-rgb: 91 112 110;
  --wrapped-in-twilight-oklch: oklch(0.528 0.025 189.3);
}

.element {
  color: var(--wrapped-in-twilight);
  background-color: hsl(174 10% 40%);
  border-color: oklch(0.528 0.025 189.3);
}

Tailwind CSS v4

@theme {
  --color-wrapped-in-twilight: #5b706e;
  --color-wrapped-in-twilight-50: #edf8f7;
  --color-wrapped-in-twilight-100: #dfebea;
  --color-wrapped-in-twilight-200: #c9d8d7;
  --color-wrapped-in-twilight-300: #aabcba;
  --color-wrapped-in-twilight-400: #8ea3a1;
  --color-wrapped-in-twilight-500: #748c8a;
  --color-wrapped-in-twilight-600: #627674;
  --color-wrapped-in-twilight-700: #4e5f5d;
  --color-wrapped-in-twilight-800: #394544;
  --color-wrapped-in-twilight-900: #27302f;
  --color-wrapped-in-twilight-950: #151c1b;
}

SCSS

$wrapped-in-twilight: #5b706e;
$wrapped-in-twilight-rgb: 91, 112, 110;
$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);
}