#E6E3E4

CSS

:root {
  --diamonds-in-the-sky: #e6e3e4;
  --diamonds-in-the-sky-rgb: 230 227 228;
  --diamonds-in-the-sky-oklch: oklch(0.918 0.004 354.7);
}

.element {
  color: var(--diamonds-in-the-sky);
  background-color: hsl(340 6% 90%);
  border-color: oklch(0.918 0.004 354.7);
}

Tailwind CSS v4

@theme {
  --color-diamonds-in-the-sky: #e6e3e4;
  --color-diamonds-in-the-sky-50: #f6f5f5;
  --color-diamonds-in-the-sky-100: #e9e7e8;
  --color-diamonds-in-the-sky-200: #d5d3d4;
  --color-diamonds-in-the-sky-300: #b9b7b7;
  --color-diamonds-in-the-sky-400: #a09d9e;
  --color-diamonds-in-the-sky-500: #888586;
  --color-diamonds-in-the-sky-600: #737172;
  --color-diamonds-in-the-sky-700: #5c5a5b;
  --color-diamonds-in-the-sky-800: #434242;
  --color-diamonds-in-the-sky-900: #2e2d2e;
  --color-diamonds-in-the-sky-950: #1b1a1b;
}

SCSS

$diamonds-in-the-sky: #e6e3e4;
$diamonds-in-the-sky-rgb: 230, 227, 228;
$diamonds-in-the-sky-light: mix(#fff, $diamonds-in-the-sky, 20%);
$diamonds-in-the-sky-dark: mix(#000, $diamonds-in-the-sky, 20%);

.element {
  color: $diamonds-in-the-sky;
  box-shadow: 0 0 0 2px rgba($diamonds-in-the-sky, 0.35);
}