I think you mean the (slightly) reddish area on the flat rock, approximately "just below" the bright patch of sky
where the sun is hiding. If so, then I'd:
1) Personally, leave it, as it looks natural, or (for me Photoshop) judiciously...
2) Use the Shadows brush to deepen the shadows and then the Highlights brush to lighten them again, then...
3) Use the Brush tool for (suitably selected nearby) Color(s).