This is a very simple app that converts Hex-color-codes to percent values (from 0.0 to 1.0) for red, green and blue.
These percent values are sometimes needed in Cocoa, e.g. [NSColor colorWithDeviceRed: 0.025 green:0.5 blue:0.85 alpha:1]. So if your graphic designer just provides you with Hexcodes, it is now a bit faster to make the values ready for implementation.