In the upper left-hand corner, I'm having trouble with a blue fringe around the trees. I have tried using CA tool in camera raw to correct it, but I have had little success. It is present in the original exposure, which is a 3 image blend, but is relatively minor. Necessary increases in contrast and vibrance have led to an exacerbation of the problem. Does anyone have any advice on how to address this problem? Examples are attached.