#B05E3A

CSS

:root {
  --monument-valley: #b05e3a;
  --monument-valley-rgb: 176 94 58;
  --monument-valley-oklch: oklch(0.571 0.118 43.5);
}

.element {
  color: var(--monument-valley);
  background-color: hsl(18 50% 46%);
  border-color: oklch(0.571 0.118 43.5);
}

Tailwind CSS v4

@theme {
  --color-monument-valley: #b05e3a;
  --color-monument-valley-50: #ffecda;
  --color-monument-valley-100: #ffdcc8;
  --color-monument-valley-200: #ffc5ab;
  --color-monument-valley-300: #eaa484;
  --color-monument-valley-400: #d88764;
  --color-monument-valley-500: #c56941;
  --color-monument-valley-600: #a75938;
  --color-monument-valley-700: #86472c;
  --color-monument-valley-800: #643320;
  --color-monument-valley-900: #462315;
  --color-monument-valley-950: #2d1107;
}

SCSS

$monument-valley: #b05e3a;
$monument-valley-rgb: 176, 94, 58;
$monument-valley-light: mix(#fff, $monument-valley, 20%);
$monument-valley-dark: mix(#000, $monument-valley, 20%);

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