#7C6C00

CSS

:root {
  --muddy-brown: #7c6c00;
  --muddy-brown-rgb: 124 108 0;
  --muddy-brown-oklch: oklch(0.53 0.11 99);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(52 100% 24%);
  border-color: oklch(0.53 0.11 99);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #7c6c00;
  --color-muddy-brown-50: #fbf7d3;
  --color-muddy-brown-100: #efeac0;
  --color-muddy-brown-200: #ded6a0;
  --color-muddy-brown-300: #c3b976;
  --color-muddy-brown-400: #af9f4e;
  --color-muddy-brown-500: #99871a;
  --color-muddy-brown-600: #81721a;
  --color-muddy-brown-700: #675b15;
  --color-muddy-brown-800: #4d420c;
  --color-muddy-brown-900: #362e07;
  --color-muddy-brown-950: #211a00;
}

SCSS

$muddy-brown: #7c6c00;
$muddy-brown-rgb: 124, 108, 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);
}