How To Remove The Header inside Frame Market Theme?

Hi,

I have installed FrameMarket in here http://arabickids.islamicparentingnetwork.net/wp/

But the problem is, I dont know how to get rid of the word 'grid market' and how to change the colour black header and the white navigation bar. Also the writing.. Welcome to the Framemarket....

Please help

Thank you.

Lina