The Swift Package Index logo.Swift Package Index

Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

When working with an Xcode project:

When working with a Swift Package Manager manifest:

Select a package version:



ContrastKit is a Swift library designed to facilitate colour contrast handling within iOS, iPadOS, macOS, and tvOS applications. It provides developers with tools to automatically generate colour shades from any base colour and determine the most readable contrast colours according to established accessibility standards (AA Large, AA, and AAA).

Mark Battistella welcomes support for ContrastKit through,, and If you find this package useful, please consider supporting it.


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