Monochromatic Magic

Two things that these stylish ladies have in common: enviable hair that I can't pull off and the successful execution of monochromatic outfits. The trick to a one-color ensemble is to tinker with the shades of a neutral/almost-neutral color (AKA, orange may not be the easiest choice). The outfit on the left has a varying gradient of tan, while the pants on the right have the perfect tinge of grey, which interrupts the stark white blouse and flats. I can't wait to try this with an navy ombré skirt and a paler blue tank. Which shade would you go for?

[photo cred to 1 and 2]