Windows 10 Pro 64-Bit
-Change Cubase project and editor colors first from default settings-
- Create empty project
- Add a Instrument Track/Midi Track
- Draw in Some Midi Data
- Go to the Editor and look at the dividing horizontal line splitting the key editor input from the Velocity/CC Lanes.
- Add a lane other than velocity
- Remove the lane just created
-> Result = The dividing horizontal line splitting the key editor input from the Velocity/CC Lanes changes from the stock blue color to the color scheme you customize. It should be this way by default and change with your color scheme or have an option to at least choose a line color for the lanes.