"So my next army was brightly colored clothes and shields.
What color did you use on your infantry?"
----> That's a good question. I too noticed that in the modern films of Chandragupta done in "Bollywood" style tend to be all over the place with colors. Soldiers depicted in the Mahābhārata epics are often very colorful, but this is probably because of the mystical time frame, and most figures are prominent lords, if not gods.
Recent Bollywood movies about Chandragupta and Asoka can be a bit over the top in their color- but then these are aslo movies about kings
Here the young Chandragupta Maurya wears simpler clothing befitting a soldier.
Chanakya (Kautily) is usually in a saffron outfit:
This website has a sample of images from the Asoka movie:
link
Mostly sources from the period describe whit kilts and sashes as the main garb of soldiers. With a shoulder wrap. Turbans and armor seem rare, but hair was very long and often rolled in a ball into a kind of top knot. Of course the nobles and kings could be much more ornate with dyed beards and fancy pants..
I have found the all white look of the infantry to be impressive, but sometimes I stray off the path and can make archers with lightly colored sashes. My maiden guards never quite got finished (they are rather ahistorical-- but part of the Ashoka movie)
but they were in red.
I also have some armored infantry and I felt they might look good in red or dark blue-- since in my mind they might be the "mercenaries"
but this is all conjecture
.
Generally, for the army of Poros if you stick to the white garb for the base troops you are on the firm ground-- adding color is more fun-- but kind of off the track a bit. I do both, but if I was doing a museum diorama, I'd stick to the white.