Matcha has matured into a great app. One thing that needs to be implimented is the ability to pick our own colours, especially for text. I'm colour blind and find a lot of default colours (in many apps, not just Matcha) are not useable because they are not distinguishable from each other.
Why not include a section in the settings that would allow users to chose their own colours for text, background, and highlights? Surely it wouldn't be that difficult to implement, and you'd be doing all your colourblind users a huge favour.