#AC9690

CSS

:root {
  --cortex: #ac9690;
  --cortex-rgb: 172 150 144;
  --cortex-oklch: oklch(0.691 0.028 35.7);
}

.element {
  color: var(--cortex);
  background-color: hsl(13 14% 62%);
  border-color: oklch(0.691 0.028 35.7);
}

Tailwind CSS v4

@theme {
  --color-cortex: #ac9690;
  --color-cortex-50: #fdf3ef;
  --color-cortex-100: #f1e5e1;
  --color-cortex-200: #e0d0cc;
  --color-cortex-300: #c5b3ad;
  --color-cortex-400: #ae9993;
  --color-cortex-500: #98807a;
  --color-cortex-600: #806c67;
  --color-cortex-700: #675752;
  --color-cortex-800: #4b3f3c;
  --color-cortex-900: #342b29;
  --color-cortex-950: #201917;
}

SCSS

$cortex: #ac9690;
$cortex-rgb: 172, 150, 144;
$cortex-light: mix(#fff, $cortex, 20%);
$cortex-dark: mix(#000, $cortex, 20%);

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