Hi Mario,

I received your drawing.

I changed color property for all objects in your drawing to “BYLAYER"
I used CHPROP command for this:
https://help.autodesk.com/view/ACDMAC/2016/ENU/?guid=GUID-05074362-FC4B-4582-A7A4-B3F6170BB4A7

Command: CHPROP<- Hit Return here
Select objects: Specify opposite corner: 77884 found
Select objects:<- Hit Return here
Enter property to change [Color/LAyer/LType/ltScale/LWeight/Thickness/TRansparency/Material/Annotative]:C       <-Type C and hit Return here
New color [Truecolor/COlorbook] <varies>:BYLAYER     <- Type BYLAYER and hit Return here
Enter property to change [Color/LAyer/LType/ltScale/LWeight/Thickness/TRansparency/Material/Annotative]: <- Hit Return here

Now all colours in the drawing will have “BYLAYER”  color property.
Is that what you need?