#A8534E

CSS

:root {
  --cheek-red: #a8534e;
  --cheek-red-rgb: 168 83 78;
  --cheek-red-oklch: oklch(0.545 0.113 24.9);
}

.element {
  color: var(--cheek-red);
  background-color: hsl(3 37% 48%);
  border-color: oklch(0.545 0.113 24.9);
}

Tailwind CSS v4

@theme {
  --color-cheek-red: #a8534e;
  --color-cheek-red-50: #ffeae4;
  --color-cheek-red-100: #ffdad4;
  --color-cheek-red-200: #ffc2ba;
  --color-cheek-red-300: #eca198;
  --color-cheek-red-400: #d9837d;
  --color-cheek-red-500: #c6655f;
  --color-cheek-red-600: #a75651;
  --color-cheek-red-700: #864541;
  --color-cheek-red-800: #643130;
  --color-cheek-red-900: #462120;
  --color-cheek-red-950: #2d1010;
}

SCSS

$cheek-red: #a8534e;
$cheek-red-rgb: 168, 83, 78;
$cheek-red-light: mix(#fff, $cheek-red, 20%);
$cheek-red-dark: mix(#000, $cheek-red, 20%);

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