Why do we wear light coloured clothes in summer and dark coloured clothes in winter

we should wear light coloured clothes in summer because as we all know that light colours reflect light and dark colours absorb light.
For example;- we all have water tank at our home's terrace you have generally observed it is generally in black colour and black colour is a dark colour so water inside it generally get's heated fast because dark colour observe light.This is the reason behind your question.