#B64A2E

CSS

:root {
  --crimson-boy: #b64a2e;
  --crimson-boy-rgb: 182 74 46;
  --crimson-boy-oklch: oklch(0.548 0.147 35.6);
}

.element {
  color: var(--crimson-boy);
  background-color: hsl(12 60% 45%);
  border-color: oklch(0.548 0.147 35.6);
}

Tailwind CSS v4

@theme {
  --color-crimson-boy: #b64a2e;
  --color-crimson-boy-50: #ffe8d8;
  --color-crimson-boy-100: #ffd8c5;
  --color-crimson-boy-200: #ffbfa7;
  --color-crimson-boy-300: #f89c80;
  --color-crimson-boy-400: #e77c60;
  --color-crimson-boy-500: #d55b3b;
  --color-crimson-boy-600: #b44e33;
  --color-crimson-boy-700: #913e29;
  --color-crimson-boy-800: #6c2c1e;
  --color-crimson-boy-900: #4c1d14;
  --color-crimson-boy-950: #320d06;
}

SCSS

$crimson-boy: #b64a2e;
$crimson-boy-rgb: 182, 74, 46;
$crimson-boy-light: mix(#fff, $crimson-boy, 20%);
$crimson-boy-dark: mix(#000, $crimson-boy, 20%);

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