Shades of blue

Client: I don’t like that blue, make it a bit lighter. Just a small bit!

I send the (unchanged) file back to her.

Client: Hmm, ok thats too light, make it a bit darker.

I send the same file - again, unchanged.

Client: Ok just ad a hint of brightness and we’re done!

Again, same file, unchanged. 

Client: Perfect! Has anyone told you that you are amazing at what you do?