In the above video from Phlearn, we learn how to use advanced color tools in Photoshop. Aaron Nace walks through a unique set of tools in the Adobe Color Themes that allow you to choose complementary colors easily.
How to Use Advanced Color Tools in Photoshop
[youtube https://www.youtube.com/watch?v=M_QC22_VB1E&w=700&showinfo=0&rel=0]