#5B4F2D

CSS

:root {
  --olive-bark: #5b4f2d;
  --olive-bark-rgb: 91 79 45;
  --olive-bark-oklch: oklch(0.431 0.053 90.6);
}

.element {
  color: var(--olive-bark);
  background-color: hsl(44 34% 27%);
  border-color: oklch(0.431 0.053 90.6);
}

Tailwind CSS v4

@theme {
  --color-olive-bark: #5b4f2d;
  --color-olive-bark-50: #faf5e5;
  --color-olive-bark-100: #eee8d5;
  --color-olive-bark-200: #dcd4bb;
  --color-olive-bark-300: #c1b799;
  --color-olive-bark-400: #aa9e7b;
  --color-olive-bark-500: #93855e;
  --color-olive-bark-600: #7d7150;
  --color-olive-bark-700: #645a3f;
  --color-olive-bark-800: #4a422d;
  --color-olive-bark-900: #332d1e;
  --color-olive-bark-950: #1f1a0e;
}

SCSS

$olive-bark: #5b4f2d;
$olive-bark-rgb: 91, 79, 45;
$olive-bark-light: mix(#fff, $olive-bark, 20%);
$olive-bark-dark: mix(#000, $olive-bark, 20%);

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