#838383

CSS

:root {
  --black-mana: #838383;
  --black-mana-rgb: 131 131 131;
  --black-mana-oklch: oklch(0.61 0 0);
}

.element {
  color: var(--black-mana);
  background-color: hsl(0 0% 51%);
  border-color: oklch(0.61 0 0);
}

Tailwind CSS v4

@theme {
  --color-black-mana: #838383;
  --color-black-mana-50: #f5f5f5;
  --color-black-mana-100: #e8e8e8;
  --color-black-mana-200: #d4d4d4;
  --color-black-mana-300: #b7b7b7;
  --color-black-mana-400: #9e9e9e;
  --color-black-mana-500: #868686;
  --color-black-mana-600: #717171;
  --color-black-mana-700: #5b5b5b;
  --color-black-mana-800: #424242;
  --color-black-mana-900: #2e2e2e;
  --color-black-mana-950: #1b1b1b;
}

SCSS

$black-mana: #838383;
$black-mana-rgb: 131, 131, 131;
$black-mana-light: mix(#fff, $black-mana, 20%);
$black-mana-dark: mix(#000, $black-mana, 20%);

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