Hi can anyone help me with the following problem

I've written a spreadsheet that calculates my customers invoices but when I
try to print it, it prints the outline in black and the colour on the screen
is grey.
I want it to print a grey outline but i can't work out why the sheet is
continuously doing this to me. I'm sure it is a obviously answer but I need
Help!!

Look forward to anyone comments

Cheers!