There should definitely be possibility to add the colors with hexadecimal values instead or in addition to the color picker. What is the system admin is color blind, how does he/she then enter the color values with the color picker only? Or if there is transfer from one system / plugin to this one, and in old plugin I have hexadecimal values. Now I have to guess which of the colors is the closest match and it takes too much time!
We installed the app as trial and I can see the hexadecimal for about a second, then I have only the color picker (as already mentioned).
As the advertise also shows the listing in hexadecimal, it would be interesting to know how to switch to permanently.
The color picker is quite useless for serious working, I have to say.