Android status bar icons are not all dark

[MareGraphics]

I have a problem with status bar icons. As you know there are so many apps that uses dark icons, but when my icons changes they are not all black, only time and few other things, its so annoying. I use Instagram all day and I have tu use version 10.13.0 so status bar is gray with white icons, and I don't have anything that Instagram offers. I downloaded APK Editor app, and tried editing Values-v23/Style.xml, I copied style.xml from Insta version 10.13.0 (current is 10.33.0) and replaced it, but its still the same.. Please guys help, I realy can't look at this awful status bar.

P.S. I'm using Lenovo K3 Note, running on android 6.0