#E6ECE3

CSS

:root {
  --silence: #e6ece3;
  --silence-rgb: 230 236 227;
  --silence-oklch: oklch(0.936 0.014 134.9);
}

.element {
  color: var(--silence);
  background-color: hsl(100 19% 91%);
  border-color: oklch(0.936 0.014 134.9);
}

Tailwind CSS v4

@theme {
  --color-silence: #e6ece3;
  --color-silence-50: #f3f6f2;
  --color-silence-100: #e6e9e4;
  --color-silence-200: #d1d6d0;
  --color-silence-300: #b4b9b2;
  --color-silence-400: #9ba098;
  --color-silence-500: #82887f;
  --color-silence-600: #6e736c;
  --color-silence-700: #585c56;
  --color-silence-800: #40433f;
  --color-silence-900: #2c2f2b;
  --color-silence-950: #1a1b18;
}

SCSS

$silence: #e6ece3;
$silence-rgb: 230, 236, 227;
$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);
}