What it looks like you want to do is called Theming.
There's a bunch of threads for doing this on the the forum.
Here's just a few of them where you should be able to get some assistance or guidance.
Thanks thanks for your replies, the learning to theme thread seems to be a bit dead so i'm sorry if I am replying with it here, I have reached a dead end and need help from a expert in the area if that last grey part can be inverted or is it hard coded into the app? https://forum.xda-developers.com/sho...postcount=1735
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