@glbutter -
A color which I think works almost as well as the popular green, is blue - as long as it is not too dark....perhaps close to a pastel shade.
In fact, I think almost any "pastel" color-shade would work well for the dark squares, as that would be pleasing and easy on the eyes while still providing sufficient contrast to the light squares, so long as the pastel is not rendered too light. You might experiment with this. In terms of your business, it would distinguish your products from the "same old same-same" of all the other producers of roll-up boards. That could be a smart move for you.
The color I dislike the most is...black. As wiscmike commented earlier, the dark pieces tend to get "lost" on the board with black squares. It is easier to visualize the relationship of the pieces if there is contrast between the color of the squares and the pieces. Black pieces on black squares make it more difficult to "visualize", as the squares tend to "camouflage" the black pieces....
https://www.google.com/search?q=pastel+colors&espv=2&biw=1309&bih=731&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiWq_H7hLbPAhVGQCYKHamoASsQsAQIKg


long history of selling quality chess supplies for many years.
I have observed the 2016 World Open in Philadelphia for five days as a non-player and green boards were the largest number being played. In a small Ohio Congress tournament last month, of the 33 boards being played that day I found 22 green and 4 black as the most popular being used.
Of my personnal business, green has 78% of my sales of my current group of boards. So, green and eggwhite will be my color on my first order of 100 boards and I'll try to print 2.25 and 2.00 squares sizes.
Don"t foget, I have the ability to manufacture any of my boards in volumns from 100 to 2,000 if the right buyer inquires.
G. Butterman