If you look at the chart, you need to match up the lower numbered red females with the lower numbered red males, and the match the same with the highest numbers. The lower number matches will eventually give you some light browns (numbers just before reds) and the higher number matches will eventually give you some blondes.

You can keep trying to match up lower and lower, higher and higher, until you have a full color range again.

Plus, while you are matching up the couples, you may get a surprise random haired child.