#E4E9DF

CSS

:root {
  --silence: #e4e9df;
  --silence-rgb: 228 233 223;
  --silence-oklch: oklch(0.927 0.014 128.6);
}

.element {
  color: var(--silence);
  background-color: hsl(90 19% 89%);
  border-color: oklch(0.927 0.014 128.6);
}

Tailwind CSS v4

@theme {
  --color-silence: #e4e9df;
  --color-silence-50: #f4f6f2;
  --color-silence-100: #e6e9e4;
  --color-silence-200: #d2d5cf;
  --color-silence-300: #b5b9b1;
  --color-silence-400: #9ca097;
  --color-silence-500: #83887e;
  --color-silence-600: #6f736b;
  --color-silence-700: #595c55;
  --color-silence-800: #41433e;
  --color-silence-900: #2d2e2b;
  --color-silence-950: #1a1b18;
}

SCSS

$silence: #e4e9df;
$silence-rgb: 228, 233, 223;
$silence-light: mix(#fff, $silence, 20%);
$silence-dark: mix(#000, $silence, 20%);

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