Uhuu your last 4 are really good (I especially like the last one)!
I've tried a few and I noticed that I'll have to use only those with light/pale colors because even a blue one I thought wasn't dark is too dark on my b/w reader and I can't see the title/author/etc (though I'll try to use a white bold text to see if it changes, but on my calibre library it was great!).
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