#A7BED6

CSS

:root {
  --rendez-blue: #a7bed6;
  --rendez-blue-rgb: 167 190 214;
  --rendez-blue-oklch: oklch(0.792 0.042 249.5);
}

.element {
  color: var(--rendez-blue);
  background-color: hsl(211 36% 75%);
  border-color: oklch(0.792 0.042 249.5);
}

Tailwind CSS v4

@theme {
  --color-rendez-blue: #a7bed6;
  --color-rendez-blue-50: #edf6ff;
  --color-rendez-blue-100: #dee9f6;
  --color-rendez-blue-200: #c7d6e6;
  --color-rendez-blue-300: #a8b9cd;
  --color-rendez-blue-400: #8ca1b7;
  --color-rendez-blue-500: #7189a2;
  --color-rendez-blue-600: #607489;
  --color-rendez-blue-700: #4c5d6e;
  --color-rendez-blue-800: #374451;
  --color-rendez-blue-900: #252f38;
  --color-rendez-blue-950: #141b23;
}

SCSS

$rendez-blue: #a7bed6;
$rendez-blue-rgb: 167, 190, 214;
$rendez-blue-light: mix(#fff, $rendez-blue, 20%);
$rendez-blue-dark: mix(#000, $rendez-blue, 20%);

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