In my opinion the greatest inspiration for finding great natural gradients is nature. Specifically, the sky. It’s most basic colours are blue and red, but in truth, it’s so much more than just that. Subtle changes in hue emulate waves, the irregular and imperfect clouds simultaneously both ruin and enhance the big picture, and should the sun ever rise or set, the whole thing is thrown into complete disarray, that, while one would think would ruin the experience, everything still sets into a perfect harmony. I have never seen a sky that didn’t somehow inspire me to feel something bigger than all the artists of our civilization have ever managed to create.