Element Nails! (AKA what happens when a relatively creative nerd gets bored)
Thumb to pinky: Mercury, Nickle, Iodine, Radon, and Yttrium.
Mercury (and Bromine on the other thumb) is a liquid which is why it’s blue. Radon (and Fluorine) are gasses (actually I believe they are both noble gasses but I’m not sure about Radon) so they are red, because I like red. Solids are black.
I referenced Clemson University’s periodic table so if I’m wrong blame them.