#8D4910

CSS

:root {
  --otterly-brown: #8d4910;
  --otterly-brown-rgb: 141 73 16;
  --otterly-brown-oklch: oklch(0.481 0.112 54.1);
}

.element {
  color: var(--otterly-brown);
  background-color: hsl(27 80% 31%);
  border-color: oklch(0.481 0.112 54.1);
}

Tailwind CSS v4

@theme {
  --color-otterly-brown: #8d4910;
  --color-otterly-brown-50: #ffeed7;
  --color-otterly-brown-100: #ffdfc4;
  --color-otterly-brown-200: #fac9a6;
  --color-otterly-brown-300: #e4a97f;
  --color-otterly-brown-400: #d28c5c;
  --color-otterly-brown-500: #bf6f35;
  --color-otterly-brown-600: #a15f2f;
  --color-otterly-brown-700: #814b25;
  --color-otterly-brown-800: #60361a;
  --color-otterly-brown-900: #442511;
  --color-otterly-brown-950: #2b1304;
}

SCSS

$otterly-brown: #8d4910;
$otterly-brown-rgb: 141, 73, 16;
$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);
}