#F8F2EF

CSS

:root {
  --silver-bird: #f8f2ef;
  --silver-bird-rgb: 248 242 239;
  --silver-bird-oklch: oklch(0.965 0.008 48.7);
}

.element {
  color: var(--silver-bird);
  background-color: hsl(20 39% 95%);
  border-color: oklch(0.965 0.008 48.7);
}

Tailwind CSS v4

@theme {
  --color-silver-bird: #f8f2ef;
  --color-silver-bird-50: #f7f4f3;
  --color-silver-bird-100: #eae7e5;
  --color-silver-bird-200: #d7d3d1;
  --color-silver-bird-300: #bbb6b4;
  --color-silver-bird-400: #a29d9a;
  --color-silver-bird-500: #8b8582;
  --color-silver-bird-600: #75706e;
  --color-silver-bird-700: #5e5a58;
  --color-silver-bird-800: #454240;
  --color-silver-bird-900: #2f2d2c;
  --color-silver-bird-950: #1c1a19;
}

SCSS

$silver-bird: #f8f2ef;
$silver-bird-rgb: 248, 242, 239;
$silver-bird-light: mix(#fff, $silver-bird, 20%);
$silver-bird-dark: mix(#000, $silver-bird, 20%);

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