Pretty simple, just the three moving averages that Binance traders see by default (7MA, 25AM & 99MA) and they use the same default colours.
Everyone has different ideas of which MA/EMA settings to use and they're all kinda highlighting the same areas whether it's 10/20, 12/26, 9/21, etc., but it stands to reason that these ones are well respected areas given that the majority of action is on Binance (for now) and it's particularly apparent on 4h charts.