Have you ever had an entity on your drawing that you can not change the colour of? Or have you ever added an entity to the drawing and it is an unexpected colour and you can seem to change it to the desired colour? Then read on.
There are several places you can change the colour of entities and there is a hierarchy which controls which colour is used.
Most of us are familiar with the first 2 but often users are not aware of the third.
1. System options
Access: Tools-> options-> System Options tab-> Colors section