#AD9690

CSS

:root {
  --cortex: #ad9690;
  --cortex-rgb: 173 150 144;
  --cortex-oklch: oklch(0.692 0.029 35);
}

.element {
  color: var(--cortex);
  background-color: hsl(12 15% 62%);
  border-color: oklch(0.692 0.029 35);
}

Tailwind CSS v4

@theme {
  --color-cortex: #ad9690;
  --color-cortex-50: #fdf2ef;
  --color-cortex-100: #f1e5e1;
  --color-cortex-200: #e0d0cc;
  --color-cortex-300: #c5b3ad;
  --color-cortex-400: #af9993;
  --color-cortex-500: #988079;
  --color-cortex-600: #816c67;
  --color-cortex-700: #675652;
  --color-cortex-800: #4c3f3c;
  --color-cortex-900: #352b29;
  --color-cortex-950: #201917;
}

SCSS

$cortex: #ad9690;
$cortex-rgb: 173, 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);
}