What color yarn should I use?

So I have decided to crochet a blanket to keep a like a log of book orders and going to crochet 1 line for every order I'm going to swap out the colors for different stories

I chose purple for dirt road

What colors should I do for

Lilinoe

And

Lucky spade

Here's the cover's if that helps

What color yarn should I use?
What color yarn should I use?
What color yarn should I use?
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