A good lawyer could argue that a blue light enhances safety especially at night. Here in California, only law enforcement can use blue lights. While part of this is so the public is aware when a LE vehicle rolling clde or running an enforcement stop, the blue lights get your attentioon for many reasons. If you are looking at 25 cars with brake lights lit, the set of blue flashing LED lights on a patrol car, grab your attention. In Nevada, Las Vegas allows and equips the fire rigs with red/blues...it really makes a difference. Therefore legality aside--red/blue lights add to recognition from motorists and helps avoid collisions when rolling code. Give it everything you can--red/blue/amber/white...anything that makes you stand out, why not?