棚子里有一张床板摆着各种题材的小人书,墙边还拉了几根绳子,一本本书翻开搭在上面,五颜六色的,很好看。
This is from the Standard Course Book of HSK5, segment 20.
The 五颜六色 with meaning colorful or multicolored, can it be used even if the number of the colors is more than 6? For example 7? 8? 42?
The opposite: If you want to say multicolored or colorful, can you say 六颜七色?七颜八色?八颜四十二色?