#956F4F

CSS

:root {
  --decreasing-brown: #956f4f;
  --decreasing-brown-rgb: 149 111 79;
  --decreasing-brown-oklch: oklch(0.572 0.067 61);
}

.element {
  color: var(--decreasing-brown);
  background-color: hsl(27 31% 45%);
  border-color: oklch(0.572 0.067 61);
}

Tailwind CSS v4

@theme {
  --color-decreasing-brown: #956f4f;
  --color-decreasing-brown-50: #fff2e2;
  --color-decreasing-brown-100: #f9e4d2;
  --color-decreasing-brown-200: #e9cfb8;
  --color-decreasing-brown-300: #d1b195;
  --color-decreasing-brown-400: #bc9676;
  --color-decreasing-brown-500: #a77c58;
  --color-decreasing-brown-600: #8d694b;
  --color-decreasing-brown-700: #71543c;
  --color-decreasing-brown-800: #543d2b;
  --color-decreasing-brown-900: #3a2a1d;
  --color-decreasing-brown-950: #24170d;
}

SCSS

$decreasing-brown: #956f4f;
$decreasing-brown-rgb: 149, 111, 79;
$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);
}