#D6E2EF

CSS

:root {
  --cold-shoulder: #d6e2ef;
  --cold-shoulder-rgb: 214 226 239;
  --cold-shoulder-oklch: oklch(0.908 0.022 250.2);
}

.element {
  color: var(--cold-shoulder);
  background-color: hsl(211 44% 89%);
  border-color: oklch(0.908 0.022 250.2);
}

Tailwind CSS v4

@theme {
  --color-cold-shoulder: #d6e2ef;
  --color-cold-shoulder-50: #f1f6fb;
  --color-cold-shoulder-100: #e3e8ef;
  --color-cold-shoulder-200: #ced5de;
  --color-cold-shoulder-300: #b0b8c3;
  --color-cold-shoulder-400: #95a0ab;
  --color-cold-shoulder-500: #7c8895;
  --color-cold-shoulder-600: #69737e;
  --color-cold-shoulder-700: #545c65;
  --color-cold-shoulder-800: #3d434a;
  --color-cold-shoulder-900: #2a2e33;
  --color-cold-shoulder-950: #171b1f;
}

SCSS

$cold-shoulder: #d6e2ef;
$cold-shoulder-rgb: 214, 226, 239;
$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);
}