Predominantly red or predominantly blue singlets are allowed, as well as singlets mimicking the UWW color scheme. If a singlet is mimicking the UWW color scheme (there is not a single color that satisfies the rule for both red and blue), the following criteria must be met:
The dominant color of blue banded singlets shall be comprised of one of the following: black, blue, green, grey, purple or silver.
The dominant color of red banded singlets shall be comprised of one of the following: white, orange, pink, red, yellow, brown or gold.