#B24D38

CSS

:root {
  --crimson-boy: #b24d38;
  --crimson-boy-rgb: 178 77 56;
  --crimson-boy-oklch: oklch(0.547 0.137 33.3);
}

.element {
  color: var(--crimson-boy);
  background-color: hsl(10 52% 46%);
  border-color: oklch(0.547 0.137 33.3);
}

Tailwind CSS v4

@theme {
  --color-crimson-boy: #b24d38;
  --color-crimson-boy-50: #ffe8db;
  --color-crimson-boy-100: #ffd9c9;
  --color-crimson-boy-200: #ffc0ad;
  --color-crimson-boy-300: #f49e87;
  --color-crimson-boy-400: #e37e68;
  --color-crimson-boy-500: #d15e46;
  --color-crimson-boy-600: #b0503c;
  --color-crimson-boy-700: #8e4030;
  --color-crimson-boy-800: #6a2d23;
  --color-crimson-boy-900: #4a1f17;
  --color-crimson-boy-950: #310e08;
}

SCSS

$crimson-boy: #b24d38;
$crimson-boy-rgb: 178, 77, 56;
$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);
}