Dark Walnut

CSS

:root {
  --dark-walnut: #56443e;
  --dark-walnut-rgb: 86 68 62;
  --dark-walnut-oklch: oklch(0.404 0.027 39.3);
}

.element {
  color: var(--dark-walnut);
  background-color: hsl(15 16% 29%);
  border-color: oklch(0.404 0.027 39.3);
}

Tailwind CSS v4

@theme {
  --color-dark-walnut: #56443e;
  --color-dark-walnut-50: #fcf3ef;
  --color-dark-walnut-100: #f0e5e1;
  --color-dark-walnut-200: #dfd1cc;
  --color-dark-walnut-300: #c4b3ad;
  --color-dark-walnut-400: #ad9993;
  --color-dark-walnut-500: #978179;
  --color-dark-walnut-600: #7f6d67;
  --color-dark-walnut-700: #665752;
  --color-dark-walnut-800: #4b3f3c;
  --color-dark-walnut-900: #342c29;
  --color-dark-walnut-950: #201917;
}

SCSS

$dark-walnut: #56443e;
$dark-walnut-rgb: 86, 68, 62;
$dark-walnut-light: mix(#fff, $dark-walnut, 20%);
$dark-walnut-dark: mix(#000, $dark-walnut, 20%);

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