Question

one should wear while cloths in summer then why the color of umbrella is usually black?

Answer 1

1. Why we wear cotton cloths in summer is it doesn't more absorbs heat and it is very soft so circulation of air through the body is available.
2. We know that black absorbs more heat than other colour and also it emits more heat that absorbed. that's why colour of the outside umbrella is black in colour and inside silver in colour to keep inside cool.

Answer 2

In summer we usually wear white cloth because white colour absorb less heat than any other colour.

The umbrella is used while raining. So to absorb water we use black colour umbrella. As we known that Black colour absorb more heat