Change wall color on plane view

[Gildaniel]

Hello my dear sweethome lovers!

Can you guess a way to change color of the wall on plan view?
There is official way only to change b/w pattern or top color on 3d view.

I use small walls to make a plan of communications (https://woodmouse.ru/3dplan/aeb/6i.html) but I need to separate them by color on plan view, it's mess now (https://woodmouse.ru/3dplan/aeb/comm.png)

May be I can add new colored patterns for the wall somewhere?

Of course, I can convert them to the furniture and paint, but plan view of so big furniture became very poor, and communications are not editable any more

PS Puybaret, why not to change top color on plan view together with 3d view?

[Puybaret]

Why don't you use colored polylines?

[Gildaniel]

Thank you, good idea!