#AB9690

CSS

:root {
  --cortex: #ab9690;
  --cortex-rgb: 171 150 144;
  --cortex-oklch: oklch(0.69 0.027 36.5);
}

.element {
  color: var(--cortex);
  background-color: hsl(13 14% 62%);
  border-color: oklch(0.69 0.027 36.5);
}

Tailwind CSS v4

@theme {
  --color-cortex: #ab9690;
  --color-cortex-50: #fcf3f0;
  --color-cortex-100: #f0e5e1;
  --color-cortex-200: #dfd1cc;
  --color-cortex-300: #c4b3ae;
  --color-cortex-400: #ad9994;
  --color-cortex-500: #97807a;
  --color-cortex-600: #806d67;
  --color-cortex-700: #665753;
  --color-cortex-800: #4b3f3c;
  --color-cortex-900: #342c29;
  --color-cortex-950: #201917;
}

SCSS

$cortex: #ab9690;
$cortex-rgb: 171, 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);
}