The background on camera left is white, it gets pinkish on camera right. Not really enough to bother with depending on your printer. I'm looking at it on two calibrated monitors, one is clearly showing it and the other isn't. Go figure. Eyedropper a 5x5 sample two thirds of the way off the canvas from the dogs left ear and you have red-241 green-237 blue-230 at the worst point.

Pretty puppy. I miss seeing a catchlight in the left eye. I don't see how you can do so well getting the even backlight with two speedlites, nice work!