Nautilus problem after changing theme colors

[pawanneupane]

I edited the assets.svg file in Inkscape to replace the default blue color with green throughout. However, I'm facing an issue with Nautilus on Ubuntu 16.04 after making the said changes.

When I open Nautilus, the side panel looks almost empty and the buttons are invisible, too. They appear once I move the mouse over them, but the sidebar looks blank again every time I change directory.

Is there a way to solve this issue and keep green as the default theme color?

This is how Nautilus looks on my system currently: