Hard to know what's not displaying as desired by looking at attached drawing.
One thought is there are specific colors set in you're corridor related styles and that's why the layer changes won't change the object color. If a specific color is assigned within the styles, the style wins. If you find a particular feature line style etc. you wish to change color within the layer manager, then set the color to "bylayer" in the styles and then it will change accordingly.
This link from help explains the various styles controlling display of corridors and where to find them.
http://docs.autodesk.com/CIV3D/2013/ENU/filesCUG/GUID-298029AF-B689-4654-A0A2-D11FFE21DC36.htmIf styles are already set to bylayer and it appears to be a Paper Space related issue as you're title suggests then click in the plan viewport and look at the vpcolor column to verify no color overrides are assigned.
C3D 2018.1
C3D 2016 SP4
Win 7 Professional 64 Bit