I think it's this... micro bull's blood - usually sold as a microgreen/garnish rather than an herbhttp://sidwainer.com/shopexd.asp?id=952&bc=no - although it also looks like micro amaranth
I think it s red amaranth I grow from seedling and harvest at micro stage about 10 days as I recall. Purple basil not as pointy and deeper in color...although who knows on ones monitor. The amaranth is brighter then the basil when at early stage.