#AED4DF

CSS

:root {
  --light-blue: #aed4df;
  --light-blue-rgb: 174 212 223;
  --light-blue-oklch: oklch(0.846 0.043 217.2);
}

.element {
  color: var(--light-blue);
  background-color: hsl(193 43% 78%);
  border-color: oklch(0.846 0.043 217.2);
}

Tailwind CSS v4

@theme {
  --color-light-blue: #aed4df;
  --color-light-blue-50: #e8f8fe;
  --color-light-blue-100: #d9ecf2;
  --color-light-blue-200: #c1d9e1;
  --color-light-blue-300: #a0bdc6;
  --color-light-blue-400: #82a5af;
  --color-light-blue-500: #668e99;
  --color-light-blue-600: #567881;
  --color-light-blue-700: #456068;
  --color-light-blue-800: #31464c;
  --color-light-blue-900: #213135;
  --color-light-blue-950: #111d20;
}

SCSS

$light-blue: #aed4df;
$light-blue-rgb: 174, 212, 223;
$light-blue-light: mix(#fff, $light-blue, 20%);
$light-blue-dark: mix(#000, $light-blue, 20%);

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