With the November release we introduce the possibility to add colours to your folders. Use it to make sure that it is easy to understand the structure. An example could be to colour all folders which contain drawings to make them easier to find. You set the folder colour in the properties of a folder and you can even adjust it for a whole branch in your folder structure by selecting it for the first folder and the choosing to apply the same colour for all sub-folders.
New folders get the same colour as the folder they are created in by default.