#DAE7E5

CSS

:root {
  --homoeopathic-blue: #dae7e5;
  --homoeopathic-blue-rgb: 218 231 229;
  --homoeopathic-blue-oklch: oklch(0.918 0.014 185.9);
}

.element {
  color: var(--homoeopathic-blue);
  background-color: hsl(171 21% 88%);
  border-color: oklch(0.918 0.014 185.9);
}

Tailwind CSS v4

@theme {
  --color-homoeopathic-blue: #dae7e5;
  --color-homoeopathic-blue-50: #f1f6f6;
  --color-homoeopathic-blue-100: #e3e9e9;
  --color-homoeopathic-blue-200: #ced6d5;
  --color-homoeopathic-blue-300: #b0bab9;
  --color-homoeopathic-blue-400: #96a19f;
  --color-homoeopathic-blue-500: #7c8987;
  --color-homoeopathic-blue-600: #697473;
  --color-homoeopathic-blue-700: #545d5c;
  --color-homoeopathic-blue-800: #3d4443;
  --color-homoeopathic-blue-900: #2a2f2e;
  --color-homoeopathic-blue-950: #181c1b;
}

SCSS

$homoeopathic-blue: #dae7e5;
$homoeopathic-blue-rgb: 218, 231, 229;
$homoeopathic-blue-light: mix(#fff, $homoeopathic-blue, 20%);
$homoeopathic-blue-dark: mix(#000, $homoeopathic-blue, 20%);

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