#7C6C18

CSS

:root {
  --muddy-brown: #7c6c18;
  --muddy-brown-rgb: 124 108 24;
  --muddy-brown-oklch: oklch(0.531 0.101 97.7);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(50 68% 29%);
  border-color: oklch(0.531 0.101 97.7);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #7c6c18;
  --color-muddy-brown-50: #fcf6d6;
  --color-muddy-brown-100: #efe9c3;
  --color-muddy-brown-200: #ded6a4;
  --color-muddy-brown-300: #c3b97c;
  --color-muddy-brown-400: #ae9f56;
  --color-muddy-brown-500: #98862b;
  --color-muddy-brown-600: #817227;
  --color-muddy-brown-700: #675b1f;
  --color-muddy-brown-800: #4d4213;
  --color-muddy-brown-900: #352d0c;
  --color-muddy-brown-950: #211a01;
}

SCSS

$muddy-brown: #7c6c18;
$muddy-brown-rgb: 124, 108, 24;
$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);
}