Color Merge

[Smokesmen]

Hello,

I have a quick question, 

Is it possible to merge color atributes and products into one color? 

I am using Printful for merchendise in my shop, but every time i create a t-shirt the module creates a new color (like Blue, Dark Blue, Navy etc) I would love to have just 1 choice of Blue.

 

Thanks for your help and tips