Below is a list of Hermes colors. I may be missing a few colors here and there but you can use this chart as a general reference.
Before buying a bag, it is always good to have a list of colors in mind to give to your SA. It will make it easier for he/she to find what you are looking for or atleast get very close to a color you are after.
There are so many colors in the Hermes family and new colors are introduced every year (the chart below was last updated in 2018; view posts on annual colors to see the new colors). Due to this variety, it makes it fun to collect your favorite colors. If you are starting out, it is always safe to stick to neutrals like black, grey and brown. If you missed a certain color in a year, sometimes they may relaunch that color in a future year.
Credit: Lecrin Japan