How would I describe this haircolor to my stylist?

Looks like a medium ash brown. Why not just take the photo?

I would agree and say it’s a medium ash brown, however, I would rely on color swatches. The stylist will have a swatch book, ask to see it.

A small sample of swatches are available online here: http://www.diksonusaga.com/Dikson_Color_Extra.html

This will give you an idea of what number and letter the color will be. Your stylist will be able to help you choose the color however, so no need to fret.

Bear in mind that monitors differ greatly in how they render color. My laptop sitting right next to my desktop computer makes colors look very different—one is much more greenish than the other. So we have no way of knowing if we’re seeing the same color you are.

It looks like a medium ash (cool) brown to me too.

Gadzooks, I don’t know if hair color go by different names but the color comes closest to me to burnt bmber or sepia; what cosmetic equivolent that is I can’t tell you.

Dark, dark auburn.

are you going by the roots or the rest of the hair? they’re different colours unfortunately.

I would say that is a level 3 or 4M personally. I colour my hair nearly once a month (I’m a model as well as an aspiring MUA; depends on photoshoot) so I am fairly knowledgeable.

The hair color in my avatar is from a photoshoot where I used a 3M, however, the tone was more natural versus the cool tone that photo depicts.

Personally, depending on if that is you in your avatar, I would stay away from the cooler colours. Your complexion is more of a neutral or even a warm tone. You can still use the same level of darkness, but I would test what colors are best for you! Hopefully your stylist will know how to do these tricks, but if not you can take eyeshadow and test colors on your palm side of your wrists (This is your most natural skin tone). Using a color such as pink, use a florescent-to-pastel (cooler), a pastel-to-basic (neutral) and a basic-to-deep mauve/pink (warmer). Whichever colour responds best is more likely the tone that fits your personal skin tone. You can sometimes go by the color of your eyes, but not always.

One other key identifier is how evidently blue your veins on the palm side of your wrist are.

Hope this help!
-Kristen