35551

I started at 1 and went to 30. I saw a pattern between 3 and 9. Each number which had blue was a multiple of 9. I continued on to the 9x table and proved my hypothesis about blue. Red numbers proved to be odd. I didn't really get any further because one of my class mates made my colour machine not show any colours. out of the two numbers in green they were both multiples of 11.