#A89796

CSS

:root {
  --sphinx: #a89796;
  --sphinx-rgb: 168 151 150;
  --sphinx-oklch: oklch(0.691 0.02 21.7);
}

.element {
  color: var(--sphinx);
  background-color: hsl(3 9% 62%);
  border-color: oklch(0.691 0.02 21.7);
}

Tailwind CSS v4

@theme {
  --color-sphinx: #a89796;
  --color-sphinx-50: #fbf3f2;
  --color-sphinx-100: #efe5e5;
  --color-sphinx-200: #ddd1d0;
  --color-sphinx-300: #c2b4b2;
  --color-sphinx-400: #aa9a99;
  --color-sphinx-500: #938180;
  --color-sphinx-600: #7d6d6c;
  --color-sphinx-700: #645757;
  --color-sphinx-800: #49403f;
  --color-sphinx-900: #332c2c;
  --color-sphinx-950: #1e1919;
}

SCSS

$sphinx: #a89796;
$sphinx-rgb: 168, 151, 150;
$sphinx-light: mix(#fff, $sphinx, 20%);
$sphinx-dark: mix(#000, $sphinx, 20%);

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