#5F6F71

CSS

:root {
  --wrapped-in-twilight: #5f6f71;
  --wrapped-in-twilight-rgb: 95 111 113;
  --wrapped-in-twilight-oklch: oklch(0.529 0.019 205.8);
}

.element {
  color: var(--wrapped-in-twilight);
  background-color: hsl(187 9% 41%);
  border-color: oklch(0.529 0.019 205.8);
}

Tailwind CSS v4

@theme {
  --color-wrapped-in-twilight: #5f6f71;
  --color-wrapped-in-twilight-50: #eff7f8;
  --color-wrapped-in-twilight-100: #e1eaeb;
  --color-wrapped-in-twilight-200: #cbd7d8;
  --color-wrapped-in-twilight-300: #adbabc;
  --color-wrapped-in-twilight-400: #92a2a4;
  --color-wrapped-in-twilight-500: #788a8c;
  --color-wrapped-in-twilight-600: #667577;
  --color-wrapped-in-twilight-700: #515d5f;
  --color-wrapped-in-twilight-800: #3b4445;
  --color-wrapped-in-twilight-900: #282f30;
  --color-wrapped-in-twilight-950: #161c1c;
}

SCSS

$wrapped-in-twilight: #5f6f71;
$wrapped-in-twilight-rgb: 95, 111, 113;
$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);
}