Question

how many colour in worlds

Answer 1

more than 10 million .........

Answer 2

They have shown that we can see about 1000 levels of light-dark,
100 levels of red-green,
 and 100 levels of yellow-blue
for a single viewing condition in a laboratory.
This means that the total number of colors we can see is about 1000 x 100 x 100 = 10,000,000