#920A00

CSS

:root {
  --brick-red: #920a00;
  --brick-red-rgb: 146 10 0;
  --brick-red-oklch: oklch(0.418 0.166 30.3);
}

.element {
  color: var(--brick-red);
  background-color: hsl(4 100% 29%);
  border-color: oklch(0.418 0.166 30.3);
}

Tailwind CSS v4

@theme {
  --color-brick-red: #920a00;
  --color-brick-red-50: #ffe5d7;
  --color-brick-red-100: #ffd4c5;
  --color-brick-red-200: #ffbaa7;
  --color-brick-red-300: #ff9680;
  --color-brick-red-400: #f07360;
  --color-brick-red-500: #df4f3c;
  --color-brick-red-600: #bc4434;
  --color-brick-red-700: #973629;
  --color-brick-red-800: #71261f;
  --color-brick-red-900: #501914;
  --color-brick-red-950: #350906;
}

SCSS

$brick-red: #920a00;
$brick-red-rgb: 146, 10, 0;
$brick-red-light: mix(#fff, $brick-red, 20%);
$brick-red-dark: mix(#000, $brick-red, 20%);

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