Denver Riddle's tutorials on color correcting in Final Cut Pro X are some of the best. Now he's turned his talents to producing tutorials for Blackmagic Design's DaVinci Resolve.
First of all, if you've never come across Denver's free FCPX colour grading tutorials on Color Grading Central then please check them out. They are still some of the best out there and show a high level of professionalism some tutorials sadly lack.
He's now moved his attention to DaVinci Resolve, which he quite rightly says has filled the void that Apple's Color left when we went from seven to ten.