#ECF1F4

CSS

:root {
  --distant-wind-chime: #ecf1f4;
  --distant-wind-chime-rgb: 236 241 244;
  --distant-wind-chime-oklch: oklch(0.955 0.007 233.6);
}

.element {
  color: var(--distant-wind-chime);
  background-color: hsl(203 27% 94%);
  border-color: oklch(0.955 0.007 233.6);
}

Tailwind CSS v4

@theme {
  --color-distant-wind-chime: #ecf1f4;
  --color-distant-wind-chime-50: #f3f5f7;
  --color-distant-wind-chime-100: #e6e8ea;
  --color-distant-wind-chime-200: #d2d5d7;
  --color-distant-wind-chime-300: #b4b8ba;
  --color-distant-wind-chime-400: #9b9fa2;
  --color-distant-wind-chime-500: #82878a;
  --color-distant-wind-chime-600: #6e7275;
  --color-distant-wind-chime-700: #585b5d;
  --color-distant-wind-chime-800: #404344;
  --color-distant-wind-chime-900: #2c2e2f;
  --color-distant-wind-chime-950: #191b1c;
}

SCSS

$distant-wind-chime: #ecf1f4;
$distant-wind-chime-rgb: 236, 241, 244;
$distant-wind-chime-light: mix(#fff, $distant-wind-chime, 20%);
$distant-wind-chime-dark: mix(#000, $distant-wind-chime, 20%);

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