#8F5C82

CSS

:root {
  --plum-highness: #8f5c82;
  --plum-highness-rgb: 143 92 130;
  --plum-highness-oklch: oklch(0.543 0.085 336.5);
}

.element {
  color: var(--plum-highness);
  background-color: hsl(315 22% 46%);
  border-color: oklch(0.543 0.085 336.5);
}

Tailwind CSS v4

@theme {
  --color-plum-highness: #8f5c82;
  --color-plum-highness-50: #ffecfd;
  --color-plum-highness-100: #fcdef2;
  --color-plum-highness-200: #eec7e1;
  --color-plum-highness-300: #d5a7c6;
  --color-plum-highness-400: #bf8bb1;
  --color-plum-highness-500: #aa709b;
  --color-plum-highness-600: #905f83;
  --color-plum-highness-700: #734c69;
  --color-plum-highness-800: #55374e;
  --color-plum-highness-900: #3b2636;
  --color-plum-highness-950: #251421;
}

SCSS

$plum-highness: #8f5c82;
$plum-highness-rgb: 143, 92, 130;
$plum-highness-light: mix(#fff, $plum-highness, 20%);
$plum-highness-dark: mix(#000, $plum-highness, 20%);

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