Amore, Noriko, and Rene of Paris like to add a "-R" (which stands for ROOTED) at the end of the color to indicate it is darker at the roots. For example they have the color Creamy Toffee (non rooted), and the color Creamy Toffee-R which is the same color just with darker roots.
However, there is a catch. They have a line of colors called Hybrant which have a softly shadowed root, but these colors will not always end in an R. This is where you have to read the full description on their color chart which will let you know if it will have dark rooting.
They also have an option called Long Rooted, which is abbreviated with LR. This means instead of the standard two to three inches of roots you have 5-7inches of long rooting causing the darker rooting to frame the face.
Estetica uses "RT" at the end of the color, to explain it being rooted.
For example, the color RH1488 is not rooted, but RH1488RT8 is rooted.
Jon Renau uses "S" (stands for SHADED) in their color numbers to show it is rooted (or shaded). For example, the color 14/26 is non rooted, and 14/26S10 is rooted.
The number after the "S" will let you know what level of color they use to create the shading. The color 12FS8 is telling you it is shaded with a color 8 (medium brown), where as 12FS12 is telling you it is shaded with a 12 (light brown).
Raquel Welch, Gabor, and HairDo use "SS" (stands for Shadow Shade) in the color to indicate roots.
An example would be R8/29, which is a non rooted color, and R8/29SS, which is rooted.
Gabor also likes to offer lighter rooted options so the effect isn't as dramatic.
Does this help you in your journey to find the perfect shade?
We sure hope so!
Let us know in the comments below if there is a wig code out there you would like explained!