I have completed the Basic Theme Development Course and I did exactly what you did in the code but I can’t get meta box option in the Projects Editor and for Customizer API, I can’t change color or label of “Latest from Technology”. The Customizer Options are showing in the Customizer but they do not change the required colors or labels.

For all Theme Files:

https://preview.c9users.io/betarid/customtheme

Thanks