Tame out-of-gamut colors
Next, choose Select>Color Range, and in the Select menu, choose Out of Gamut, and Click OK to load a selection of the out-of-gamut colors. Then, choose Image>Adjustments>Hue/Saturation and move the Saturation value to ~10, and click OK. You should see the gray areas get smaller. Deselect and repeat this procedure using the same ~10 Saturation setting until the gray color indicating out-of-gamut colors is no longer visible.