#9A6768

CSS

:root {
  --cinnapink: #9a6768;
  --cinnapink-rgb: 154 103 104;
  --cinnapink-oklch: oklch(0.568 0.066 18);
}

.element {
  color: var(--cinnapink);
  background-color: hsl(359 20% 50%);
  border-color: oklch(0.568 0.066 18);
}

Tailwind CSS v4

@theme {
  --color-cinnapink: #9a6768;
  --color-cinnapink-50: #ffeeed;
  --color-cinnapink-100: #fde0df;
  --color-cinnapink-200: #efcac9;
  --color-cinnapink-300: #d7aba9;
  --color-cinnapink-400: #c38f90;
  --color-cinnapink-500: #ae7476;
  --color-cinnapink-600: #936364;
  --color-cinnapink-700: #764f50;
  --color-cinnapink-800: #57393a;
  --color-cinnapink-900: #3d2728;
  --color-cinnapink-950: #261516;
}

SCSS

$cinnapink: #9a6768;
$cinnapink-rgb: 154, 103, 104;
$cinnapink-light: mix(#fff, $cinnapink, 20%);
$cinnapink-dark: mix(#000, $cinnapink, 20%);

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