App or tweak to counterbalance yellow-tinted screen edge? topic

I'm unlucky enough to be the owner of one of the OPOs that have a yellow tint on the bottom edge of the display that fades and clears up the closer you get to the middle of the display, like a gradient. Now, there are apps and tweaks to change the hue and calibration of the entire display, but is anyone aware of an app or tweak that can adjust the hue like a gradient? Thinking along the lines of F.lux butas a gradient instead of applying evenly to the entire display.