Considering that:In the measurement what is mainly seen is the height of the stack and The color of the top chip and maybe although less of the second, As well as that a possible misidentification of the quantity should not result in large error deviations.
I think that: The best guarantee is given if the distinction is made by fives of increasing quantity with the characteristics of the change for each fives as obvious as possible. The chip with the highest value should be placed on top, followed by the others in descending order, which should preferably only be gray and up to four, so that the height of the stack represents a corresponding quantity.
I tentatively named it the “pentadic system” from the Greek word “pente” meaning “five”. Τhe relevant table in pdf format at the link: https://www.dropbox.com/s/7utsvihpqec86r6/AA Chips.pdf?dl=0