#854C25

CSS

:root {
  --otterly-brown: #854c25;
  --otterly-brown-rgb: 133 76 37;
  --otterly-brown-oklch: oklch(0.476 0.094 52.8);
}

.element {
  color: var(--otterly-brown);
  background-color: hsl(24 56% 33%);
  border-color: oklch(0.476 0.094 52.8);
}

Tailwind CSS v4

@theme {
  --color-otterly-brown: #854c25;
  --color-otterly-brown-50: #ffefdc;
  --color-otterly-brown-100: #ffe0cb;
  --color-otterly-brown-200: #f5caaf;
  --color-otterly-brown-300: #deab8a;
  --color-otterly-brown-400: #cb8f6a;
  --color-otterly-brown-500: #b77448;
  --color-otterly-brown-600: #9a623e;
  --color-otterly-brown-700: #7c4e31;
  --color-otterly-brown-800: #5c3823;
  --color-otterly-brown-900: #412717;
  --color-otterly-brown-950: #291508;
}

SCSS

$otterly-brown: #854c25;
$otterly-brown-rgb: 133, 76, 37;
$otterly-brown-light: mix(#fff, $otterly-brown, 20%);
$otterly-brown-dark: mix(#000, $otterly-brown, 20%);

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