So glad you like it.
Answering your question, it depends on the pallete your are using. The more colors in your pallette, the more easy will be for lightning and shadowing; however i would recommend steping over your color pallete.
I share with you this example:
In both second and third row, i just reused the same colors that my pallette already have. (Of course, you can adapt it to your own pallette).
In the case i want, for example: the second row style but the shadow to be more darker. Beacuse that's the most "dark gray" that my pallette have, i would need to add that new color to my pallete and "reorganize my pallette".
Hope you find this answer helpful!
Regards.