The colored tape on the shuttlecock indicated the speed of the shuttle in the air and the range of temperature where it is recommended to play. There are three colored tapes, red, blue, and green. "Red" represents "Fast" and is suitable for cold conditions (Temperature < 13 °c). "Blue" represents "Medium-speed" and is good for normal conditions (Temperature: 12-23°c). "Green" means "Slow" and is suitable for warm conditions (Temperature: 22-33°c).