#BE422E

CSS

:root {
  --crimson-boy: #be422e;
  --crimson-boy-rgb: 190 66 46;
  --crimson-boy-oklch: oklch(0.55 0.163 31.7);
}

.element {
  color: var(--crimson-boy);
  background-color: hsl(8 61% 46%);
  border-color: oklch(0.55 0.163 31.7);
}

Tailwind CSS v4

@theme {
  --color-crimson-boy: #be422e;
  --color-crimson-boy-50: #ffe5d7;
  --color-crimson-boy-100: #ffd5c5;
  --color-crimson-boy-200: #ffbba6;
  --color-crimson-boy-300: #ff977f;
  --color-crimson-boy-400: #ef755f;
  --color-crimson-boy-500: #dd513a;
  --color-crimson-boy-600: #bb4632;
  --color-crimson-boy-700: #963828;
  --color-crimson-boy-800: #70271e;
  --color-crimson-boy-900: #4f1a13;
  --color-crimson-boy-950: #340906;
}

SCSS

$crimson-boy: #be422e;
$crimson-boy-rgb: 190, 66, 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);
}