#9C99A8

CSS

:root {
  --lavender-ash: #9c99a8;
  --lavender-ash-rgb: 156 153 168;
  --lavender-ash-oklch: oklch(0.69 0.022 295);
}

.element {
  color: var(--lavender-ash);
  background-color: hsl(252 8% 63%);
  border-color: oklch(0.69 0.022 295);
}

Tailwind CSS v4

@theme {
  --color-lavender-ash: #9c99a8;
  --color-lavender-ash-50: #f6f4fb;
  --color-lavender-ash-100: #e8e6ee;
  --color-lavender-ash-200: #d5d2dd;
  --color-lavender-ash-300: #b8b5c2;
  --color-lavender-ash-400: #9f9caa;
  --color-lavender-ash-500: #878494;
  --color-lavender-ash-600: #726f7d;
  --color-lavender-ash-700: #5b5964;
  --color-lavender-ash-800: #424149;
  --color-lavender-ash-900: #2e2d33;
  --color-lavender-ash-950: #1b1a1f;
}

SCSS

$lavender-ash: #9c99a8;
$lavender-ash-rgb: 156, 153, 168;
$lavender-ash-light: mix(#fff, $lavender-ash, 20%);
$lavender-ash-dark: mix(#000, $lavender-ash, 20%);

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