#EFEEEE

CSS

:root {
  --super-silver: #efeeee;
  --super-silver-rgb: 239 238 238;
  --super-silver-oklch: oklch(0.95 0.001 17.2);
}

.element {
  color: var(--super-silver);
  background-color: hsl(0 3% 94%);
  border-color: oklch(0.95 0.001 17.2);
}

Tailwind CSS v4

@theme {
  --color-super-silver: #efeeee;
  --color-super-silver-50: #f5f5f5;
  --color-super-silver-100: #e8e8e8;
  --color-super-silver-200: #d4d4d4;
  --color-super-silver-300: #b8b7b7;
  --color-super-silver-400: #9f9e9e;
  --color-super-silver-500: #878686;
  --color-super-silver-600: #727171;
  --color-super-silver-700: #5b5a5a;
  --color-super-silver-800: #434242;
  --color-super-silver-900: #2e2e2e;
  --color-super-silver-950: #1b1a1a;
}

SCSS

$super-silver: #efeeee;
$super-silver-rgb: 239, 238, 238;
$super-silver-light: mix(#fff, $super-silver, 20%);
$super-silver-dark: mix(#000, $super-silver, 20%);

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