No, I am not recommending neon nails for your wedding, but the idea of being able to do color gradations on your nails with gel polish is intriguing. Imagine using pale blue, fading to grey and then pale pink. very pretty and unique.
Blue & green glitters applied in patches on a black base with carefully painted pearly silver shimmer (or white) lines on top. Get yourself one stunning cracked art glass look! Experiment with other bases to get different dominant colors in the look.