The science of colour genetics is a mind boggling subject. I think to avoid even more confusion, just simply remember that dilue red is yellow, so dilute ash red chequer is ash yellow chequer, dilute recessive red (chocolate) is recessive yellow. dilute ash red bar (mealy) is cream. How it actually gets there is up to you whether you wish to learn about it.
I've attached a photo of one of my young indigo chequer hen and a dilute indigo chequer hen. She looks yellow, but she isn't.