My message tags have the colors I’ve set them to be. My Gmail folders (labels) have the same colors. My eM Client folders have no colors at all
As @Gary advised in another thread, eM Client Gmail folder / label colours “are taken from the tags”. So for any custom tags / folders you can change the colour in the Tags dialogue.
Go to “Menu / Tags” and click the drop-down menu next to Local Tags at the top, and select your Gmail account. Then right click your mouse on a Gmail folder and click “Edit”. You can then see & select the folder colour. Finally Save Tags.
The Gmail Labels will then appear with an “Outline” folder colour & the Folder name is coloured.
Also if you set any Gmail label (folder) colours in Gmail online via your Webmail browser, eM Client will then automatically update that same label (folder) colour.
(Gmail Labels online)
(Gmail eM Client Labels)
Note:- I personally prefer to have a “Solid folder colour” like Gmail online so its easier to see in the lighter themes, which hopefully eM Client will do as an option in Settings down the track.