IntelliJ IDEA - change color of a separated code editors margin

Question

I want to change color of a margin of separated code editors.

To be precise:

• you have two files open in editor
• on one file you click with your right mouse button
• click "Split Down"
• now you have two code editors (two files, two panels) in one window

I want to change color of a margin between this two files (as the red line shows): Now it's black and it's hard to see where one code ends and second begins.

Answer 1

Currently, it's not possible. Please, vote for IDEA-146953 and follow for updates.