I think there might still be something confusing with the rules on pages 3-5.
On page 3 it shows an example a red 3 and a white 2 for a 32. I believe the track display sample should make it clear that the red numbers across the top correspond to the red die and the white numbers down the side correspond to the white die. At first I thought the red was down the left side because of the red background. Perhaps it is just me.
The spaces on the grid are numbered.
The color combination of the dice does not really matter, as long as you are consistent in how you compose the 11-66 dice roll. The important factor is to determine the correct grid space, and then the order of priority.
Specific colors are not mentioned to determine the grid space purposefully, as the gamer may be using a blue die and a yellow die, for example.