Color is off some -- there's a cyan tint to his shirt. Sometimes this can be a flash/laundry chemicals interaction, but I suspect not in this case as removing it improves their skin tones. Your color saturation is quite low; I'd raise it, and you don't have a single black pixel in the entire photo. Here's a side by side where I sifted away from that cyan tint till his shirt cleaned up, increased the color saturation a noticeable amount and made a Levels tweak that brought the shadows to black. I can see where the contrast increase from the Levels change made be unwanted in a portrait, but here it is for reference.
Joe
View attachment 38449