What does the different colors on the heated apparels/accessories buttons mean?

Different colors means different heating levels.
Red(Very High): 70°C（158°F）
Purple(High): 60°C（140°F）
Green(Medium): 50°C（122°F）
Yello(Low): 45°C（113°F）
Blue(Pre-heat): 40°C（104°F）
*Tested at a room temperature of 21°C/69.8°F.