Gradient Color Control -- GIMP Questions

[ladysephiroth]

I've been playing with this for a while and I can't get it to work -- I'm going to try and describe this as best I can.  I want to gradient from red to blue across a CP, but whenever I use the gradient or blur or smudge tools, it turns everything purple.  I don't want purple, I'd like at the very least the middle to maybe grayscale in the blend , or for the pixels to just mix up and not blend (blue and red pixels stirred like sugar crystals not mixed like food coloring.) I'm doing a MCU Civil War theme, so one side is Iron Man (red) and the other is Cap (blue) and purple just looks redonkuous! I'm using GIMP 2.8 to do all my artwork. Is this even possible?

Thank you!!!!

[Kier]

Not sure, gradients are tough sometimes without blending.

You could work with two layers and delete a checkboard pattern of the top one in diminishing sizes etc to show the color beneath.

[BAMBOO]

Something like this?

[BGoulette]

To get something similar to what Bamboo posted above, just add a third stop in the middle of your blue/red gradient and make it white (or gray); that should prevent the "purplization" in the middle. Full disclosure: I'm not terribly familiar with GIMP, but I'm assuming it can handle something like that?