If you want to keep using them, just set the color to yellow only and the pattern to spread spectrum only. In that configuration they're just yellow blinking lights, which should be legal (many jurisdictions make it illegal to use anything other than white, yellow, or red lights on a road vehicle); you might even get away with yellow/white.

Or maybe not; I was just looking through the lighting regulations for my city and apparently I can only use flashing lights in an emergency (i.e., hazard lights). So technically it's illegal to run my taillight and my headlight on flash while riding (but it's ok if I break down in the road). Not that it would ever be enforced, but it's interesting.

Cops haven't hassled me about my MonkeyLights, except for one cop asking me where I got them. I do make a point of avoiding any flashing blue/red combos, so it doesn't appear that I'm attempting a very poor emergency vehicle impersonation.