Whether this was New to you or you already Knew it, I hope you enjoy the following resources.
Color Schemes in Action
Check out https://www.w3schools.com/colors/colors_monochromatic.asp to test out what different color schemes could look like together on a website.
Optical Illusion
This 2 minute optical illusion uses complementary colors and is just too fun and interesting to not share with you. https://www.youtube.com/watch?v=GbHMLV4CZfI