Blue Feather

CSS

:root {
  --blue-feather: #aed9ec;
  --blue-feather-rgb: 174 217 236;
  --blue-feather-oklch: oklch(0.861 0.052 226.6);
}

.element {
  color: var(--blue-feather);
  background-color: hsl(198 62% 80%);
  border-color: oklch(0.861 0.052 226.6);
}

Tailwind CSS v4

@theme {
  --color-blue-feather: #aed9ec;
  --color-blue-feather-50: #e7f8ff;
  --color-blue-feather-100: #d7ecf6;
  --color-blue-feather-200: #bed9e6;
  --color-blue-feather-300: #9dbdcd;
  --color-blue-feather-400: #7ea5b6;
  --color-blue-feather-500: #608ea1;
  --color-blue-feather-600: #527888;
  --color-blue-feather-700: #41606d;
  --color-blue-feather-800: #2e4650;
  --color-blue-feather-900: #1f3138;
  --color-blue-feather-950: #0f1d22;
}

SCSS

$blue-feather: #aed9ec;
$blue-feather-rgb: 174, 217, 236;
$blue-feather-light: mix(#fff, $blue-feather, 20%);
$blue-feather-dark: mix(#000, $blue-feather, 20%);

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