I made a quick adjustment - if it satisfies the look you are going for, hopefully this correction technique may be worthwhile.
The skin tones between the warm (freckles, tan) and neutral (chest area) can be brought closer together to deemphasize their contrast and warm the very neutral chest area - if that is okay with what you are going for. This approach can be altered to taste.
I used the color sampler tool to measure the color of the right arm (very tan/freckled) and the chest area (very pale). The attached figure shows you what I measured (in the "original" image). I use the Lab color model because it separates color from luminance, so I can make my adjustments to match color without worrying about how RGB adjustments also change luminance.
I sampled the right arm and then created a curves adjustment layer so I could alter the channel curves to get the chest area (neutral) to match the color (a and b values) of the arm. It will make the whole image super warm, but no big deal, you will paint in the adjustment to the chest area using a mask on the curve adjustment layer, and then alter the opacity of the adjustment layer to get just the right amount of warmth into the chest area without affecting the rest of the image. The "add color" curve on the figure shows the adjustment - you want to remove blue (to get more yellow) and add some red to achieve a nice skin tone. To make the adjustment alter JUST THE COLOR and not the underlying luminance, change the blend mode of the adjustment layer to Color. Paint in and adjust opacity of the layer to taste.
Next, I sampled the resulting chest area and tried to deemphasize the color in the heavily saturated, warm arm. The same approach is applied - I created a curves adjustment layer and adjusted blue upward in the arm's tonal range to add blue (remove yellow) and then adjusted the red channel downward to remove red. This keeps the red-yellow ratio about the same, just less of it. Remember to change the blend mode to Color.
Start with full strength edits to the color and then back off the opacity of the adjustment and selectively paint in the adjustment with varying opacity of the brush as you build up the layer mask. Lots of control. I left the chest edit a little on the strong side so you get the point - simply reducing the opacity of the curve would decrease the color and make is possibly more convincing.
hopefully this helps!
PS - here is a link to the PSD:
please log in to view hosted photos in full size.