#9D3728

CSS

:root {
  --brick: #9d3728;
  --brick-rgb: 157 55 40;
  --brick-oklch: oklch(0.481 0.139 31);
}

.element {
  color: var(--brick);
  background-color: hsl(8 59% 39%);
  border-color: oklch(0.481 0.139 31);
}

Tailwind CSS v4

@theme {
  --color-brick: #9d3728;
  --color-brick-50: #ffe8dc;
  --color-brick-100: #ffd8ca;
  --color-brick-200: #ffbfae;
  --color-brick-300: #f69d89;
  --color-brick-400: #e47d6b;
  --color-brick-500: #d25c4a;
  --color-brick-600: #b14f3f;
  --color-brick-700: #8f3f32;
  --color-brick-800: #6a2c25;
  --color-brick-900: #4b1e19;
  --color-brick-950: #310d09;
}

SCSS

$brick: #9d3728;
$brick-rgb: 157, 55, 40;
$brick-light: mix(#fff, $brick, 20%);
$brick-dark: mix(#000, $brick, 20%);

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