Hey, guys.
Here is a tip on how to quickly randomize particle color by using Const in Instance mode.
Enjoy!

Nice, but what I found - when I save my results with color I prefer, close wz4 and open and load this file again. Color always selected random.
It seems like on each loading wz4 calculate different color scheme.

Best seen in third example

I know that. Maybe I just came across some unexpected use of Const. Anyway, it's fun.