#897300

CSS

:root {
  --muddy-brown: #897300;
  --muddy-brown-rgb: 137 115 0;
  --muddy-brown-oklch: oklch(0.56 0.115 95.7);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(50 100% 27%);
  border-color: oklch(0.56 0.115 95.7);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #897300;
  --color-muddy-brown-50: #fef6d1;
  --color-muddy-brown-100: #f2e9bd;
  --color-muddy-brown-200: #e1d59d;
  --color-muddy-brown-300: #c7b872;
  --color-muddy-brown-400: #b39e47;
  --color-muddy-brown-500: #9d8504;
  --color-muddy-brown-600: #85700d;
  --color-muddy-brown-700: #6b5a0c;
  --color-muddy-brown-800: #504105;
  --color-muddy-brown-900: #372d04;
  --color-muddy-brown-950: #221a00;
}

SCSS

$muddy-brown: #897300;
$muddy-brown-rgb: 137, 115, 0;
$muddy-brown-light: mix(#fff, $muddy-brown, 20%);
$muddy-brown-dark: mix(#000, $muddy-brown, 20%);

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