#A49893

CSS

:root {
  --earl-grey: #a49893;
  --earl-grey-rgb: 164 152 147;
  --earl-grey-oklch: oklch(0.689 0.016 44.1);
}

.element {
  color: var(--earl-grey);
  background-color: hsl(18 9% 61%);
  border-color: oklch(0.689 0.016 44.1);
}

Tailwind CSS v4

@theme {
  --color-earl-grey: #a49893;
  --color-earl-grey-50: #f9f4f1;
  --color-earl-grey-100: #ede6e3;
  --color-earl-grey-200: #dad2cf;
  --color-earl-grey-300: #bfb5b1;
  --color-earl-grey-400: #a79c97;
  --color-earl-grey-500: #90837e;
  --color-earl-grey-600: #7a6f6a;
  --color-earl-grey-700: #615955;
  --color-earl-grey-800: #47413e;
  --color-earl-grey-900: #322d2b;
  --color-earl-grey-950: #1d1a18;
}

SCSS

$earl-grey: #a49893;
$earl-grey-rgb: 164, 152, 147;
$earl-grey-light: mix(#fff, $earl-grey, 20%);
$earl-grey-dark: mix(#000, $earl-grey, 20%);

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