#BBDCE6

CSS

:root {
  --cotton-clouds: #bbdce6;
  --cotton-clouds-rgb: 187 220 230;
  --cotton-clouds-oklch: oklch(0.874 0.037 218);
}

.element {
  color: var(--cotton-clouds);
  background-color: hsl(194 46% 82%);
  border-color: oklch(0.874 0.037 218);
}

Tailwind CSS v4

@theme {
  --color-cotton-clouds: #bbdce6;
  --color-cotton-clouds-50: #eaf8fd;
  --color-cotton-clouds-100: #dbebf1;
  --color-cotton-clouds-200: #c4d8df;
  --color-cotton-clouds-300: #a3bcc5;
  --color-cotton-clouds-400: #86a4ad;
  --color-cotton-clouds-500: #6a8d97;
  --color-cotton-clouds-600: #5a7780;
  --color-cotton-clouds-700: #485f66;
  --color-cotton-clouds-800: #34464b;
  --color-cotton-clouds-900: #233034;
  --color-cotton-clouds-950: #121d1f;
}

SCSS

$cotton-clouds: #bbdce6;
$cotton-clouds-rgb: 187, 220, 230;
$cotton-clouds-light: mix(#fff, $cotton-clouds, 20%);
$cotton-clouds-dark: mix(#000, $cotton-clouds, 20%);

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