There's no second opinion about that - one of Android's greatest strengths is its flexibility and customizability. There's barely anything that can't be changed with the right tools and knowledge at hand. That same "law of Android" applies to software navigation bars as well.
In case your Android device comes with a software navigation bar, you can now tweak up the looks of it and shape it as per your heartfelt content. Introducing Navbar Apps, an intuitive tool that will allow you to customize your navbar with a solid color of your choice that dynamically changes according to the app you're currently using or use an exquisite image of your choice.
Make software navigation bars great again!
There are lots of styles to choose from: if you're still stuck in 2011, you can get that good ol' Nyan Cat navigation bar, a bunch of watermelons, cherries, a lively color palette, and so on. You can also make Navbar Apps show the current battery percentage of your phone as a simple bar which is undeniably a useful feature in our humble opinion.
The great thing about Navbar Apps is that it does not need root access and works with any device running Android 5.0 or newer. It comes with some in-app purchases, but the base suite is free to download and use.