This pattern was tested for colour blind accessibility by https://www.color-blindness.com/coblis-color-blindness-si... It will also still make sense when printed in the black/white setting on your printer.

Finished Size: approximately 12.6 x 9.1 times bigger than your 7 round square. Sample measures 97” x 71”

Total yardage: 6150 yards
Squares: 4650 yards
Join: 1500 yards