Black Chestnut Oak

CSS

:root {
  --black-chestnut-oak: #252321;
  --black-chestnut-oak-rgb: 37 35 33;
  --black-chestnut-oak-oklch: oklch(0.258 0.005 67.6);
}

.element {
  color: var(--black-chestnut-oak);
  background-color: hsl(30 6% 14%);
  border-color: oklch(0.258 0.005 67.6);
}

Tailwind CSS v4

@theme {
  --color-black-chestnut-oak: #252321;
  --color-black-chestnut-oak-50: #f6f5f4;
  --color-black-chestnut-oak-100: #e9e7e6;
  --color-black-chestnut-oak-200: #d5d4d2;
  --color-black-chestnut-oak-300: #b9b7b5;
  --color-black-chestnut-oak-400: #a09e9b;
  --color-black-chestnut-oak-500: #888683;
  --color-black-chestnut-oak-600: #73716f;
  --color-black-chestnut-oak-700: #5c5a59;
  --color-black-chestnut-oak-800: #434241;
  --color-black-chestnut-oak-900: #2f2e2d;
  --color-black-chestnut-oak-950: #1b1a1a;
}

SCSS

$black-chestnut-oak: #252321;
$black-chestnut-oak-rgb: 37, 35, 33;
$black-chestnut-oak-light: mix(#fff, $black-chestnut-oak, 20%);
$black-chestnut-oak-dark: mix(#000, $black-chestnut-oak, 20%);

.element {
  color: $black-chestnut-oak;
  box-shadow: 0 0 0 2px rgba($black-chestnut-oak, 0.35);
}