I have a green female budgie. She is olive in color. Her cheek
patches are a diluted blue, however, like my grey budgie. So, now I'm wondering if she's grey-green and not double factor dark green. Does the grey factoring alter the color of the cheek patches? Can a bird be Both grey factored and double dark factored?

A bird can be any combination of single/double factor dark and/or single/double factor grey.

Pictures would help

greygreens can look like olives, an olive should have a more violet cheek patch though, with a greygreen having a blue or grey type of one...

Her cheek patches are a cornflower blue. Definitely not violet. They're just like my grey greywing's patches. Gonna try and get some photos up today.

Here are a few pics

Attached Thumbnails

       

looks lika a greygreen normal to me.

it is always tricky to tell whether they are light medium or dak shade though...

Thanks. Everyone here is so helpful!

Grey green if ever I saw one.