Formica reintroduced several versions of Skylark boomerang back in the late '80s with some fanfare. I have a letter opener they gave away at the time that is made of two layers of boomerang glued back to back and then cut into a boomerang shape with one end chiseled to provide the letter opener point. One side is pink, the other charcoal, but that charcoal has the outline boomerangs in pale pink, pale grey and aqua rather than the monochromatic modern charcoal boomerangs. I don't know how long they produced these colors.