Celeste Blue

CSS

:root {
  --celeste-blue: #406374;
  --celeste-blue-rgb: 64 99 116;
  --celeste-blue-oklch: oklch(0.48 0.049 230);
}

.element {
  color: var(--celeste-blue);
  background-color: hsl(200 29% 35%);
  border-color: oklch(0.48 0.049 230);
}

Tailwind CSS v4

@theme {
  --color-celeste-blue: #406374;
  --color-celeste-blue-50: #e8f8ff;
  --color-celeste-blue-100: #d9ebf6;
  --color-celeste-blue-200: #c0d8e6;
  --color-celeste-blue-300: #9fbccc;
  --color-celeste-blue-400: #81a4b6;
  --color-celeste-blue-500: #648da1;
  --color-celeste-blue-600: #557788;
  --color-celeste-blue-700: #445f6d;
  --color-celeste-blue-800: #304650;
  --color-celeste-blue-900: #213038;
  --color-celeste-blue-950: #101d22;
}

SCSS

$celeste-blue: #406374;
$celeste-blue-rgb: 64, 99, 116;
$celeste-blue-light: mix(#fff, $celeste-blue, 20%);
$celeste-blue-dark: mix(#000, $celeste-blue, 20%);

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