Good explanation! The scattering of light that causes clouds to appear white is called Mie Scattering. More information can be found here: https://www.metoffice.gov.uk/learning/clouds/why-are-clouds-white
The sky appears blue in colour (and sunrise/sunset appears red) due to a process called Rayleigh Scattering, more information can be found here: https://www.metoffice.gov.uk/learning/optics/why-is-the-sky-blue