It seems that there are stronger feelings to minimize the plain chips. For now let us assume that we're going to have 3 colors for the plain chips. I have heard discussions of grey and imperial blue as $0.25 and $0.10 chips, and they seem pretty valid. Unless there are some strong objections I will stick with those as the first two colors.
Now, let's pick a third color! Please, let's not have discussions of "let's have both pink and arc yellow." Assume now we're going to have 3 colors and just pick the best one you like right now. If we have any leftovers from the spotted chips, we can pick a 4th or 5th plain chip.






Chips are White, Lavender, Light Green, Pink, Orange, Arc Yellow, Chocolate (left to right).
I just want to first caution picking white/lavender/light green as they may be the body color for (or at the very least similar in color to) the spotted chips.