[stumped]

for actual reading , i use the green background option in the kindle fire app, for kindle books, and I set up a mint colour background for moon + , for epub , which is very close to the kindle's idea of " green".
to use the attached, you save it somewhere on your device , then tell moon + to use it as a background image

I don't much care about menu / book selection screen colours, I don't spend hours on those !