I looked up the Q&A you mentioned, and it specifically allows the use of two colors (as long as the main color meets the size requirements). Again, all teams should be prepared to defend their position with documentation.
Rule <R15> requires that the body of the number (the part that is ≥4 inches tall and with ≥3/4 inch stroke width) be of “a” (single) contrasting color. Adding small borders of a highly contrasting color around the external perimeter of the number for the purposes of increasing the contrast and clarity of the number would not violate the rule, as long as the addition of the contrasting border does not reduce the size or stroke width of the body of the number.
tried kicking it and shoving it and pushing the box. I laughed and suggested they had time to go back and fix it. I think they came back 6 more times (made me laugh every time) before either giving up on it or just barely making it (Jason remind me!). At Championships they saw me walking by and wanted to grab me for a photo saying “I was their nicest robot inspector ever” or something like that. I still need to dig out a copy of that photo 