#D3E2E6

CSS

:root {
  --valley-of-tears: #d3e2e6;
  --valley-of-tears-rgb: 211 226 230;
  --valley-of-tears-oklch: oklch(0.903 0.017 215.5);
}

.element {
  color: var(--valley-of-tears);
  background-color: hsl(193 28% 86%);
  border-color: oklch(0.903 0.017 215.5);
}

Tailwind CSS v4

@theme {
  --color-valley-of-tears: #d3e2e6;
  --color-valley-of-tears-50: #f0f6f8;
  --color-valley-of-tears-100: #e2e9ec;
  --color-valley-of-tears-200: #cdd6d9;
  --color-valley-of-tears-300: #aebabd;
  --color-valley-of-tears-400: #94a1a5;
  --color-valley-of-tears-500: #7a898d;
  --color-valley-of-tears-600: #677478;
  --color-valley-of-tears-700: #535d60;
  --color-valley-of-tears-800: #3c4446;
  --color-valley-of-tears-900: #292f30;
  --color-valley-of-tears-950: #171c1d;
}

SCSS

$valley-of-tears: #d3e2e6;
$valley-of-tears-rgb: 211, 226, 230;
$valley-of-tears-light: mix(#fff, $valley-of-tears, 20%);
$valley-of-tears-dark: mix(#000, $valley-of-tears, 20%);

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