#DBE6F6

CSS

:root {
  --cold-shoulder: #dbe6f6;
  --cold-shoulder-rgb: 219 230 246;
  --cold-shoulder-oklch: oklch(0.921 0.025 257.6);
}

.element {
  color: var(--cold-shoulder);
  background-color: hsl(216 60% 91%);
  border-color: oklch(0.921 0.025 257.6);
}

Tailwind CSS v4

@theme {
  --color-cold-shoulder: #dbe6f6;
  --color-cold-shoulder-50: #f1f5fc;
  --color-cold-shoulder-100: #e3e8f0;
  --color-cold-shoulder-200: #ced5df;
  --color-cold-shoulder-300: #b0b8c4;
  --color-cold-shoulder-400: #959fad;
  --color-cold-shoulder-500: #7c8797;
  --color-cold-shoulder-600: #697280;
  --color-cold-shoulder-700: #545b66;
  --color-cold-shoulder-800: #3d434b;
  --color-cold-shoulder-900: #2a2e34;
  --color-cold-shoulder-950: #171b20;
}

SCSS

$cold-shoulder: #dbe6f6;
$cold-shoulder-rgb: 219, 230, 246;
$cold-shoulder-light: mix(#fff, $cold-shoulder, 20%);
$cold-shoulder-dark: mix(#000, $cold-shoulder, 20%);

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