i could be wrong, and this is JUST an opinion, but as i remember the package says "not for highway use". that implies some sort of federal D.O.T. standard. at least to me. looking over local law the emphasis seems to be more on red to the rear, and having some sort of reflective device to the rear.
around here (indiana) most cops are appreciative of the work it takes to restore/rod a vehicle, and a few of the guys i work with have classic cars of their own. (a yellow blown and injected camaro street rod owned by a local police officer comes to mind). i don't think i would sweat the blue dots. i have a set for the cabover 51. personally i like the brightness it gives brake lights and causes them to be more noticible. makes me think they might be safer than just red.
i like safe. no reports to write.