#E6E7EB

CSS

:root {
  --diamond-cut: #e6e7eb;
  --diamond-cut-rgb: 230 231 235;
  --diamond-cut-oklch: oklch(0.928 0.005 275);
}

.element {
  color: var(--diamond-cut);
  background-color: hsl(228 11% 91%);
  border-color: oklch(0.928 0.005 275);
}

Tailwind CSS v4

@theme {
  --color-diamond-cut: #e6e7eb;
  --color-diamond-cut-50: #f5f5f7;
  --color-diamond-cut-100: #e7e8ea;
  --color-diamond-cut-200: #d3d4d6;
  --color-diamond-cut-300: #b6b7ba;
  --color-diamond-cut-400: #9d9ea2;
  --color-diamond-cut-500: #85868a;
  --color-diamond-cut-600: #707175;
  --color-diamond-cut-700: #5a5b5d;
  --color-diamond-cut-800: #424244;
  --color-diamond-cut-900: #2d2e2f;
  --color-diamond-cut-950: #1a1a1c;
}

SCSS

$diamond-cut: #e6e7eb;
$diamond-cut-rgb: 230, 231, 235;
$diamond-cut-light: mix(#fff, $diamond-cut, 20%);
$diamond-cut-dark: mix(#000, $diamond-cut, 20%);

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