The "bright.dwg" file has some secret juju in it to allow the insert of a block to look good.
The block file is Table4Chairs.dwg .

Open bright.dwg .
Make layer 0 the active layer.
Insert/Insert Block/Table4Chairs.dwg taking all the defaults. That block looks good.
Make layer TablesChairs the active layer.
Insert/Insert Block/Table4Chairs.dwg taking all the defaults. That block looks good.
Layer color doesn't matter.
Get a top view and both inserts have the same color.
Get a Top Front Left view and they are identical and look good.

Now open a new file.
Change Visual Style to Modeling.
Change layer 0 to a color 47, just to keep compatibility, but it really doesn't matter.
Insert/Insert Block/Table4Chairs.dwg taking all the defaults. That block doesn't look as good.
Get a top view and it's bland.
Get a Top Front Left view and it looks bland.

The question is, how can the same insert produce different colored output when all else looks the same?

Click on a chair leg and get its characteristics. Color is ByLayer, but the layer color doesn't matter.