#E9EFE7

CSS

:root {
  --silence: #e9efe7;
  --silence-rgb: 233 239 231;
  --silence-oklch: oklch(0.945 0.012 137.8);
}

.element {
  color: var(--silence);
  background-color: hsl(105 20% 92%);
  border-color: oklch(0.945 0.012 137.8);
}

Tailwind CSS v4

@theme {
  --color-silence: #e9efe7;
  --color-silence-50: #f3f6f3;
  --color-silence-100: #e6e9e5;
  --color-silence-200: #d1d5d1;
  --color-silence-300: #b4b9b3;
  --color-silence-400: #9ba099;
  --color-silence-500: #828880;
  --color-silence-600: #6e736d;
  --color-silence-700: #585c57;
  --color-silence-800: #40433f;
  --color-silence-900: #2c2f2b;
  --color-silence-950: #191b19;
}

SCSS

$silence: #e9efe7;
$silence-rgb: 233, 239, 231;
$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);
}