While I am absolutely no good painter myself, I find color schemes really important.
So, my shields for Saurus warriors are all the same. And I still like them

(also, it's easy to paint, which is another plus for me!)
My saurus warriors are primarily green, with white stripes and a few bright red/yellow points (the head, mostly).
My shields are divided in 3 'strokes', the middle of the shield (large scale), the scales surrounding the middle and the other scales which sit around the edge.
The middle is yellow, the surrounding scales are orange and the edge is red.
Like a bullseye

. Your opponent should hit the yellow part, that way they don't hit your saurus
My skink shields are even easier. I use white, blue, orange, yellow and red to paint it. Every scale gets a different color. It gives a nice colorfull shield that still looks solid. Did I mention this was easy?
Anyway, my painting skills aren't good in any way. So don't take any advice from me
The Hunted