#907051

CSS

:root {
  --decreasing-brown: #907051;
  --decreasing-brown-rgb: 144 112 81;
  --decreasing-brown-oklch: oklch(0.569 0.06 65.2);
}

.element {
  color: var(--decreasing-brown);
  background-color: hsl(30 28% 44%);
  border-color: oklch(0.569 0.06 65.2);
}

Tailwind CSS v4

@theme {
  --color-decreasing-brown: #907051;
  --color-decreasing-brown-50: #fff2e3;
  --color-decreasing-brown-100: #f6e5d3;
  --color-decreasing-brown-200: #e6d0ba;
  --color-decreasing-brown-300: #cdb297;
  --color-decreasing-brown-400: #b89879;
  --color-decreasing-brown-500: #a27e5b;
  --color-decreasing-brown-600: #896b4e;
  --color-decreasing-brown-700: #6e553e;
  --color-decreasing-brown-800: #513e2c;
  --color-decreasing-brown-900: #392b1e;
  --color-decreasing-brown-950: #23180e;
}

SCSS

$decreasing-brown: #907051;
$decreasing-brown-rgb: 144, 112, 81;
$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);
}