A few figures showing different color interactions. Notice how the figure seems to get brighter in places where red overlaps black a phenomenon the ties in with Moire patterns. These points lead to the impression of lighter lines. Do these "lines" appear perfectly vertical?

As a different effect, notice how the array of black lines does not seem to be ordered exactly vertically.

 

 

The figure below is similar, but it show more strongly that there seems to be an orange cast over sections of the figure and that the background is not white.

Also, the green lines do not seem to be arrayed perfectly horizontally

 

 

 

 

 

 

The smaller gray in the patches below are both the same hue and are both "neutral" gray.