There are three main types of plate boundary: divergent, convergent and transform. Plates move away from one another at divergent boundaries. This happens at mid-ocean ridges. Plates move towards one another at convergent boundaries; one plate is forced below another in a process called subduction.
The skin of a Concord grape is typically dark blue or purple, and often is covered with a lighter-coloured epicuticular wax bloom that can be rubbed off. It is a slip-skin variety, meaning that the skin is easily separated from the fruit. Concord grapes have large seeds and are highly aromatic.
Looking for a gray-blue color. I thought I had picked a gray-taupe color for my bedroom (Pashmina from the BM Affinity collection) but I keep coming back to wanting just a hint of blue on the wall. Problem is, all the gray-blues I've looked at so far either don't have enough gray, so they look baby blue, or they're too dark and depressing.