Greyish Black

CSS

:root {
  --greyish-black: #555152;
  --greyish-black-rgb: 85 81 82;
  --greyish-black-oklch: oklch(0.439 0.005 0.2);
}

.element {
  color: var(--greyish-black);
  background-color: hsl(345 2% 33%);
  border-color: oklch(0.439 0.005 0.2);
}

Tailwind CSS v4

@theme {
  --color-greyish-black: #555152;
  --color-greyish-black-50: #f6f4f5;
  --color-greyish-black-100: #e9e7e8;
  --color-greyish-black-200: #d6d3d4;
  --color-greyish-black-300: #bab6b7;
  --color-greyish-black-400: #a19d9e;
  --color-greyish-black-500: #898586;
  --color-greyish-black-600: #747071;
  --color-greyish-black-700: #5d5a5b;
  --color-greyish-black-800: #444242;
  --color-greyish-black-900: #2f2d2e;
  --color-greyish-black-950: #1c1a1b;
}

SCSS

$greyish-black: #555152;
$greyish-black-rgb: 85, 81, 82;
$greyish-black-light: mix(#fff, $greyish-black, 20%);
$greyish-black-dark: mix(#000, $greyish-black, 20%);

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