Structural color material and cosmetics using the same

To provide a structural color material and a cosmetics using the same, the structural color material is consisted of resin particles having a structural color, and the resin particle is a resin particle obtained by feeding a fluid which mixes an aqueous medium containing water-soluble free radical polymerization initiator and a free radical polymerizable monomer at a constant flow rate in a small tubular runner, and conditioning instantaneously the fluid temperature to a temperature set in advance, after that, reacting a part of the free radical polymerizable monomer in the presence of the water-soluble free radical polymerization initiator, to form uniform particle nuclei of resin particles in the small tubular runner, then subjecting the polymerization reaction solution containing obtained particle nuclei to polymerization reaction using a reactor appending a stirring apparatus; the average particle diameter of the resin particle is in the range of 150 to 400 nm, and the absolute value of zeta potential is