Looking at the color value of the snapshot, I do not see any difference in the original and its 3 copies. Monika is right - repeated arrangement of gradients, at times do appear as if the colors have changes. But that is not the case in your design. It should print fine.
The colours at the upper right corner seem to be the same RGB within 1 in the R value when eyedropped in Photoshop from a screenshot (67-66R/183G/232B).
You may compare the first and third image, covering the next image, and viewing at different angles.
Judging colours at transitions is always hard.
Obviously, the screen capture in RGB may be less accurate.
The positive issue is strange.