our VI exercise!!!

We have already finished our VI exercise and exercise VII and I have my experience about it!!!
When I'm doing my exercise no. 6, I can't choose a good color but then I have chosen a better color and I think it's a good color to our eyes....
I addressed it by asking the help of my classmates and groupmates...and also of our teacher
I want to share to you that if you choose a background color, you should choose a color that is good to our eyes...