Folders are great because it keeps your email organized. Changing the colors of these folders are great because you can easily see your folders and it's aesthetically pleasing to my eyes.

What's missing is being able to change the "Message Count" color next to the Folders, as right now they are the same color as the name of the Folder.

What I suggest, is to change the color of the "Message Count" to either the same color as the folder, move it to the left or the far right of the Folder.