Dark blue is always a popular color for nails, but it is very difficult for us to make the nails looking good. It is so gorgeous when you have a perfect design with this color. If you do not know how to use this color, then the coffin nails is a perfect choice. The dark blue coffin nails can have so many different designs, we can have matte dark blue nails for all the fingers, you can also design some nails with the marble images. For witner, we can put some glitter on the nails and it will be so gorgeous and so attractive when you attend some parties. Here…