Why are clouds seen to be of white colour?

(N/A) The intensity of scattered light is proportional to $\frac{1}{\lambda^{4}}$ (Rayleigh scattering).
However,this law holds true only when the size of the scattering particles $(a)$ is much smaller than the wavelength of light $(\lambda)$,i.e.,$a << \lambda$.
For clouds,the water droplets have a size $(a)$ much larger than the wavelength of visible light $(a >> \lambda)$.
In this regime,all wavelengths of visible light are scattered nearly equally.
Since all colours of the visible spectrum are scattered with almost the same intensity,the resulting combination of scattered light appears white to our eyes.