#917050

CSS

:root {
  --decreasing-brown: #917050;
  --decreasing-brown-rgb: 145 112 80;
  --decreasing-brown-oklch: oklch(0.57 0.062 65.2);
}

.element {
  color: var(--decreasing-brown);
  background-color: hsl(30 29% 44%);
  border-color: oklch(0.57 0.062 65.2);
}

Tailwind CSS v4

@theme {
  --color-decreasing-brown: #917050;
  --color-decreasing-brown-50: #fff2e3;
  --color-decreasing-brown-100: #f7e4d3;
  --color-decreasing-brown-200: #e7d0b9;
  --color-decreasing-brown-300: #cdb296;
  --color-decreasing-brown-400: #b89778;
  --color-decreasing-brown-500: #a37e5a;
  --color-decreasing-brown-600: #8a6b4d;
  --color-decreasing-brown-700: #6e553d;
  --color-decreasing-brown-800: #523e2c;
  --color-decreasing-brown-900: #392a1d;
  --color-decreasing-brown-950: #23180d;
}

SCSS

$decreasing-brown: #917050;
$decreasing-brown-rgb: 145, 112, 80;
$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);
}