I agree, but in this case following the wires would be more difficult having only one prototype board available.
Using different colors do help a bit.
However, I carefully checked the wiring when making this board using the following table:
col led pin chip pin
1 13 2
2 3 11
3 4 6
4 10 7
5 6 3
6 11 10
7 15 5
8 16 8
row led pin chip pin
1 9 14
2 14 16
3 8 20
4 12 23
5 1 21
6 7 15
7 2 17
8 5 22
BTW, image of the complete setup showing all three 7219+led matrix units plus a bit more 
