Android navbar doesn't match Opera theme

[Blurryface]

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I'm a bit more concerned about UI part of any app, I've tried using opera constantly, I want to use it because it's ux is better that any other browser( that what I felt personally) and the one thing that bother me is the gesture/navbar of Android bg color not matching the opera theme, is that so hard to make it same color as opera nav on different themes?