#DCE5E1

CSS

:root {
  --homoeopathic-blue: #dce5e1;
  --homoeopathic-blue-rgb: 220 229 225;
  --homoeopathic-blue-oklch: oklch(0.914 0.011 167.8);
}

.element {
  color: var(--homoeopathic-blue);
  background-color: hsl(153 15% 88%);
  border-color: oklch(0.914 0.011 167.8);
}

Tailwind CSS v4

@theme {
  --color-homoeopathic-blue: #dce5e1;
  --color-homoeopathic-blue-50: #f2f6f4;
  --color-homoeopathic-blue-100: #e4e9e7;
  --color-homoeopathic-blue-200: #d0d6d3;
  --color-homoeopathic-blue-300: #b2b9b6;
  --color-homoeopathic-blue-400: #99a19d;
  --color-homoeopathic-blue-500: #808985;
  --color-homoeopathic-blue-600: #6c7470;
  --color-homoeopathic-blue-700: #565c5a;
  --color-homoeopathic-blue-800: #3f4441;
  --color-homoeopathic-blue-900: #2b2f2d;
  --color-homoeopathic-blue-950: #191b1a;
}

SCSS

$homoeopathic-blue: #dce5e1;
$homoeopathic-blue-rgb: 220, 229, 225;
$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);
}