#6B73A7

CSS

:root {
  --twinkle-night: #6b73a7;
  --twinkle-night-rgb: 107 115 167;
  --twinkle-night-oklch: oklch(0.57 0.081 276.8);
}

.element {
  color: var(--twinkle-night);
  background-color: hsl(232 25% 54%);
  border-color: oklch(0.57 0.081 276.8);
}

Tailwind CSS v4

@theme {
  --color-twinkle-night: #6b73a7;
  --color-twinkle-night-50: #eff3ff;
  --color-twinkle-night-100: #e1e6ff;
  --color-twinkle-night-200: #ccd1f7;
  --color-twinkle-night-300: #aeb4e1;
  --color-twinkle-night-400: #929ace;
  --color-twinkle-night-500: #7881bc;
  --color-twinkle-night-600: #666d9e;
  --color-twinkle-night-700: #51577f;
  --color-twinkle-night-800: #3a405e;
  --color-twinkle-night-900: #282c42;
  --color-twinkle-night-950: #16192b;
}

SCSS

$twinkle-night: #6b73a7;
$twinkle-night-rgb: 107, 115, 167;
$twinkle-night-light: mix(#fff, $twinkle-night, 20%);
$twinkle-night-dark: mix(#000, $twinkle-night, 20%);

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