This time, they used computer software to generate two versions of each face, one with high contrast, the other with low contrast. (sciencedaily.com)
Picking colors that have lower contrast between stripes and background may help too. (unefemme.net)
There are some like mine which have a more muted silver front cover with the collage on the front with a very low contrast which were part of the initial release. (shshatteredmemories.com)