For anyone developing iOS 7 maps-enabled apps, you probably know that the pin image has changed for this version of iOS. iOS has long limited the provided pin colours to Red, Green and Purple. Here is a layered Photoshop file that we used in the latest version of AthensBook and you can use to change the pin colour. Besides the base layer, there are two hue-saturation-brightness layers. You use the first layer titled ‘Brightness’ to change the brightness of the colour. Don’t touch the hue or saturation sliders on this layer. The second layer allows you to change the hue and saturation of the pin colour.
Using both layers allows you to set the pin colour to anything.
Disclaimer: This is obviously based on a pin image that I extracted using UIImagePNGRepresentation and copied the resulting PNG after running the extracting code in the iOS Simulator. The original pin image is (almost certainly) copyrighted by Apple Inc. I am not affiliated with Apple Inc. in any way whatsoever and I am only providing this composite to assist developers in creating iOS 7 applications. I do not claim any copyright on Apple’s intellectual property. If you are an Apple employee or, dog forbid, lawyer, and object to the use of this bitmap, please let me know and I will remove the image. Hopefully you’re not that bothered/braindead and appreciate its value to the Apple Developer community.