giginet/prettycolors

PrettyColors is a Swift library that makes terminal text colorful and styled. It lets you add colors, bold formatting, and underlines to strings your app prints to the command line, so your CLI tool's output stands out instead of being plain white-on-black. Under the hood, it works by generating ANSI escape codes, those are special invisible character sequences that terminals interpret as instructions to change text appearance. The project conforms to the ECMA Standard 48, which is the official spec for these codes. You tell it something like "make this text red and bold" and it wraps your string with the right codes so the terminal renders it correctly. Anyone building a command-line tool in Swift would find this useful. If you're writing a script that logs errors in red, warnings in yellow, and success messages in green, this handles the formatting for you. It also supports 256-color mode, so you can pick from a wider palette than just the basic eight colors. The library works across Apple platforms, macOS, iOS, watchOS, and tvOS, as well as Linux. Notable tradeoffs: it's specifically a Swift package, so it only applies if you're working in that language. It integrates with the common Swift dependency managers (Carthage, CocoaPods, and Swift Package Manager), so adding it to a project is straightforward if you're already using those tools. The README is brief, with most of the usage examples living in the test files rather than in the documentation itself.