Many brands have the option for you to input other foundation and shades you already own to suggest a best match in your range. This is by far the easiest way to pick a shade online, otherwise you're really just guessing!
Finally got my hands on this today in store! I'm glad I was able to try it on in person, because it does run a hair deeper than the pictures online. I was looking at Yukon, maybe Vienna. Yukon was too dark and pink to the point of pulling orange on my skin. I ended up with Mont Blanc, which is a pretty good match for my cool/neutral undertone.
You don’t have my shade. I’m deep medium with yellow undertone. You propose me « Macao ». It’s my shade but not my undertone. It’s too olive for me. Sorry for my english, I’m french