I'm trying to alter the color of a pattern without actually editing it - similar to layer masking in PhotoShop.
For instance, in the example below, I want to ultimately change the color of (the visible parts of) the pattern (middle layer) to shades of yellow (top layer), but still be able to see the green underneath. I don't want to manually change the pattern swatch because I don't know which swatch I want to use yet. I assume the answer is something relating to masking, and adjusting the blending mode. I just haven't figured out the specific way in which to do it. Can anyone help?