#24A6D6

CSS

:root {
  --mystic-blue: #24a6d6;
  --mystic-blue-rgb: 36 166 214;
  --mystic-blue-oklch: oklch(0.68 0.126 229.2);
}

.element {
  color: var(--mystic-blue);
  background-color: hsl(196 71% 49%);
  border-color: oklch(0.68 0.126 229.2);
}

Tailwind CSS v4

@theme {
  --color-mystic-blue: #24a6d6;
  --color-mystic-blue-50: #d2fdff;
  --color-mystic-blue-100: #bef0ff;
  --color-mystic-blue-200: #9cdfff;
  --color-mystic-blue-300: #6fc3ec;
  --color-mystic-blue-400: #3aacda;
  --color-mystic-blue-500: #0094c8;
  --color-mystic-blue-600: #007da9;
  --color-mystic-blue-700: #006488;
  --color-mystic-blue-800: #004a64;
  --color-mystic-blue-900: #003346;
  --color-mystic-blue-950: #001f2e;
}

SCSS

$mystic-blue: #24a6d6;
$mystic-blue-rgb: 36, 166, 214;
$mystic-blue-light: mix(#fff, $mystic-blue, 20%);
$mystic-blue-dark: mix(#000, $mystic-blue, 20%);

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