What is a brilliant deep pink color with a purplish tinge, one of the dyes derived from aniline; -- so called from Solferino in Italy, where a battle was fought about the time of its discovery called?

solferino — A brilliant deep pink color with a purplish tinge, one of the dyes derived from aniline; -- so called from Solferino in Italy, where a battle was fought about the time of its discovery. (Webster's 1913.)