#5D4631

CSS

:root {
  --black-power: #5d4631;
  --black-power-rgb: 93 70 49;
  --black-power-oklch: oklch(0.413 0.045 63.4);
}

.element {
  color: var(--black-power);
  background-color: hsl(29 31% 28%);
  border-color: oklch(0.413 0.045 63.4);
}

Tailwind CSS v4

@theme {
  --color-black-power: #5d4631;
  --color-black-power-50: #fff3e8;
  --color-black-power-100: #f3e5d8;
  --color-black-power-200: #e2d1c0;
  --color-black-power-300: #c8b3a0;
  --color-black-power-400: #b29983;
  --color-black-power-500: #9c8067;
  --color-black-power-600: #846c58;
  --color-black-power-700: #6a5746;
  --color-black-power-800: #4e3f32;
  --color-black-power-900: #362b22;
  --color-black-power-950: #211911;
}

SCSS

$black-power: #5d4631;
$black-power-rgb: 93, 70, 49;
$black-power-light: mix(#fff, $black-power, 20%);
$black-power-dark: mix(#000, $black-power, 20%);

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