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.

Total yardage: 1450 yards
Squares: 1000 yards
Join: 450 yards

Finished size is approximately 12 times bigger than your 3-round square. Sample measures 40” square.