#8F7153

CSS

:root {
  --decreasing-brown: #8f7153;
  --decreasing-brown-rgb: 143 113 83;
  --decreasing-brown-oklch: oklch(0.57 0.057 66.2);
}

.element {
  color: var(--decreasing-brown);
  background-color: hsl(30 27% 44%);
  border-color: oklch(0.57 0.057 66.2);
}

Tailwind CSS v4

@theme {
  --color-decreasing-brown: #8f7153;
  --color-decreasing-brown-50: #fff3e4;
  --color-decreasing-brown-100: #f5e5d4;
  --color-decreasing-brown-200: #e5d0bb;
  --color-decreasing-brown-300: #ccb398;
  --color-decreasing-brown-400: #b6987b;
  --color-decreasing-brown-500: #a17f5d;
  --color-decreasing-brown-600: #886b4f;
  --color-decreasing-brown-700: #6d563f;
  --color-decreasing-brown-800: #513e2d;
  --color-decreasing-brown-900: #382b1f;
  --color-decreasing-brown-950: #23180e;
}

SCSS

$decreasing-brown: #8f7153;
$decreasing-brown-rgb: 143, 113, 83;
$decreasing-brown-light: mix(#fff, $decreasing-brown, 20%);
$decreasing-brown-dark: mix(#000, $decreasing-brown, 20%);

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