Circa 1954 Standard Tile-in sink.
The color is Standard’s “Clair de Lune” blue and was very popular in the 1950’s. This particular sink does have several small chips in the basin, it’s probably best as a replacement for one that’s broken. It’s 20″ wide by 19 1/2″ front to back. 8″ centers, will accept just about any widespread faucet. Cool Sink!