Question

Why do clouds appear white or greyish in color? Why not any other particular color?

Answer 1

In clouds, the water molecules are large. Then, the light scatter fully in the clouds.
Thats why clouds appear white.
when the water droplets are quite less, then scattrring slightly decreases, thats why it form greyish colour.

But no other colors forms, because size of water molecules in clouds is large. Scattering is high.No colour other than white and grey.