#B14E32

CSS

:root {
  --crimson-boy: #b14e32;
  --crimson-boy-rgb: 177 78 50;
  --crimson-boy-oklch: oklch(0.546 0.136 36.6);
}

.element {
  color: var(--crimson-boy);
  background-color: hsl(13 56% 45%);
  border-color: oklch(0.546 0.136 36.6);
}

Tailwind CSS v4

@theme {
  --color-crimson-boy: #b14e32;
  --color-crimson-boy-50: #ffe9d9;
  --color-crimson-boy-100: #ffd9c7;
  --color-crimson-boy-200: #ffc1aa;
  --color-crimson-boy-300: #f49f83;
  --color-crimson-boy-400: #e27f63;
  --color-crimson-boy-500: #d06040;
  --color-crimson-boy-600: #af5237;
  --color-crimson-boy-700: #8d412c;
  --color-crimson-boy-800: #692e20;
  --color-crimson-boy-900: #4a1f15;
  --color-crimson-boy-950: #300e07;
}

SCSS

$crimson-boy: #b14e32;
$crimson-boy-rgb: 177, 78, 50;
$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);
}