In your respective areas, do you have anything in state/local codes to specify what color strobes should be used with alarms? Or is there a generally accepted convention in your area, e.g. red=fire, blue=intruder, etc.?
Most strobes I've seen here are a simple white. The one exception has been certain government jobs, which have used red for fire, and white (with coded pulses) for other matters.
One issue may be a difference in philosophies: Strobes are not seen by our codes as 'communication devices.' Rather, they have steadily been made more annoying, with a deliberate desire to yse the strobe to 'drive' you out .... rather than just to tell you there's trouble.
I agree there does not seem to be a standard. You usually have to read the cover plate on the strobe but that may not be practical if you are a visitor. I agree this might be a good place for a convention. Now days we do seem to have an array of emergencies they want to warn you about, particularly in "secure" locations. I remember in some places I worked there was always some kind of strobe going off when I was in a room because my clearance wasn't high enough.
So far as I'm aware, there is no "official" standard here. I don't get involved with industrial fire alarms, but I understand that red is often the preferred color, although often changed if that conflicts with any other warning devices on site.
By far the majority of intruder alarms these days use blue strobes, but again, there is no specific standard.