Let’s say that we have an app that makes use of image assets for icons, custom progress bars, etc. Now we want to allow users to theme the app, and these images need to conform to this new color scheme. The obvious solution is to add 1x and 2x versions of every single possible image asset in the app, right? No, of course not. Duplication is bad, and duplicating images is just another form of dupli
![Designing for iOS: Blending Modes](https://cdn-ak-scissors.b.st-hatena.com/image/square/343005f84a045a2269a5fe9782e9103c59d92159/height=288;version=1;width=512/http%3A%2F%2Fmedia.tumblr.com%2Fa0e0eb8c7288ceea60665b1a0615b43f%2Ftumblr_inline_mkfm80Bybc1qz4rgp.png)