blue w/ black crackle
pink
A purple or blue. Metallic colors look cool too!
Blue fingernails should look fungi infection
The color of your fingernails should never be orange, healthy fingernails have a slight pink hue to them. If you wear nail polish without a base coat first, overtime the polish can stain your nails, this will happen with dark colored lacquer. If only a couple of fingernails look a little orange, maybe, it could be the start of a fungus infection, although usually your nails will look white to brownish in color if this is the case.
If you're talking about nail polish, not necessarily. It's customary, but who cares? There's no law about it. You don't even have to use the same color for all ten fingernails. I don't.
Protein (found in Meat and Nuts (and fingernails) as far as I know, so it should help.
The deep *vertical* lines in your fingernails are genetic. If you have *horizontal* ridges in your nails, you should see a doctor.
Fingernails are made of a protein called keratin, and they grow from the base of the nail bed. They protect the fingertips and help with grasping objects. Healthy nails are smooth, uniform in color, and strong.
You should include lots of calcium in your diet if you want to strengthen your finger nails.
Most scratches from fingernails leave red marks where the scratch occurred.
Fingernail colors are not expressed in RGB. Each color can be expressed in RGB, but RGB is used to define a color in computing, while paint uses other standards.