Generates Xcode .xcassets ColorSet JSON files from color palette URLs. Extracts hex color codes embedded in URLs from palette tools such as: - Huemint (https://huemint.com) - RealtimeColors (https://realtimecolors.com) - Coolors (https://coolors.co) Any URL that encodes hex codes in its path or query string is supported. Dark mode variants are automatically calculated by inverting the HSL lightness of each light color — no manual dark palette needed. The generated Colors.xcassets folder can be dragged and dropped directly into Xcode's Assets catalog to use the colors in Swift/SwiftUI projects. Usage: colorset_generator "https://huemint.com/brand-2/#palette=2a3031-fafdfc-a19985" colorset_generator "https://coolors.co/c4f1be-a2c3a4-869d96-525b76-201e50" --output MyPalette.xcassets colorset_generator "https://www.realtimecolors.com/?colors=14140f-f8f8f6-9a9e79-aec4bd-8ea7ad" --no-dark