I used two coats of KIKO 336 - Electric Blue as my base color and applied some liquid nail tape around my nails to protect the skin from nail polish. Then using first KIKO 523 - Royal Blue and second Model's Own - Chrome Indigo I did the water spotted technique to create the spotted look. The matte finish was achieved with Essie - Matte About You.
My tutorial for water spotted nails and my most recent water spotted designs.