#A65453

CSS

:root {
  --cheek-red: #a65453;
  --cheek-red-rgb: 166 84 83;
  --cheek-red-oklch: oklch(0.545 0.108 22);
}

.element {
  color: var(--cheek-red);
  background-color: hsl(1 33% 49%);
  border-color: oklch(0.545 0.108 22);
}

Tailwind CSS v4

@theme {
  --color-cheek-red: #a65453;
  --color-cheek-red-50: #ffeae6;
  --color-cheek-red-100: #ffdbd6;
  --color-cheek-red-200: #ffc3be;
  --color-cheek-red-300: #eaa29c;
  --color-cheek-red-400: #d78481;
  --color-cheek-red-500: #c46765;
  --color-cheek-red-600: #a55756;
  --color-cheek-red-700: #854644;
  --color-cheek-red-800: #633233;
  --color-cheek-red-900: #452222;
  --color-cheek-red-950: #2d1111;
}

SCSS

$cheek-red: #a65453;
$cheek-red-rgb: 166, 84, 83;
$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);
}