Rayadillo or Milraya is a cotton blue pin-stripped uniform used by the Spanish armed forces as their tropical uniform and later adopted by the Philippine Army of the First Republic. From a distance, this uniform looks light blue to pale grey in color. There were many shades of Rayadillo cloth used for making military uniforms, plus the varied conditions of wear and tear tend to remove the blue pin-stripped color of the fabric with every next washing. A sample Spanish "Dark Rayadillo" uniform shows that the actual color of General Antonio Luna's tunic in his most famous photograph would have a grayish tinge.
Left, a "Sanidad Militar" or medical officer. Note the use of a Red Cross shoulder patch and the tricolor cockade on side of hat. His watch chain is ornately suspended from the front button to breast pockets.
Middle, Cavalry officers sporting the prescribed red trousers. Note the foremost officer wears a silver white "Aiguilette" cord.
Right, the flamboyant General Gregorio Del Pilar, his uniform is an almost white rayadillo. Blue trousers were authorized for infantry officers.