Dark Sienna

CSS

:root {
  --dark-sienna: #3c1414;
  --dark-sienna-rgb: 60 20 20;
  --dark-sienna-oklch: oklch(0.255 0.063 22.7);
}

.element {
  color: var(--dark-sienna);
  background-color: hsl(0 50% 16%);
  border-color: oklch(0.255 0.063 22.7);
}

Tailwind CSS v4

@theme {
  --color-dark-sienna: #3c1414;
  --color-dark-sienna-50: #ffefec;
  --color-dark-sienna-100: #fde0dd;
  --color-dark-sienna-200: #eecac7;
  --color-dark-sienna-300: #d6aba7;
  --color-dark-sienna-400: #c1908d;
  --color-dark-sienna-500: #ac7673;
  --color-dark-sienna-600: #926461;
  --color-dark-sienna-700: #75504e;
  --color-dark-sienna-800: #563a39;
  --color-dark-sienna-900: #3c2727;
  --color-dark-sienna-950: #261615;
}

SCSS

$dark-sienna: #3c1414;
$dark-sienna-rgb: 60, 20, 20;
$dark-sienna-light: mix(#fff, $dark-sienna, 20%);
$dark-sienna-dark: mix(#000, $dark-sienna, 20%);

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