Signals Image Artist: What do the folder colours in the primary data tree represent?

The folder colour signifies data ownership, as described below. 

SImA version 1.2 or below:

Green - Owned by the logged-in user

Blue - Owned by other group members

Grey - Owned by a deleted user

SImA version 1.3 or above:

Yellow - Owned by the logged-in user

Orange - Owned by other group members

Grey - Owned by a deleted user