On the Subject of The Uncolored Maze

Why wouldn't you print this in black and white...

Use the first letter and first number of the serial number in the table below to obtain a sequence of colors. Input this sequence into the colored buttons on the module.

D H L P T X A E I M Q U Y B F J N R V Z C G K O S W
0 4 8 OR OOR GBP BP
1 5 9 OOR BOOR RBBP BBP
2 6 OPGR PYBP PPYBP GOO
3 7 BP YBP YPPYBP OO