Sky Blue Photo Background Replacement

I have a single portrait that needs a clean background swap. Please remove everything behind the person and replace it with a solid Sky Blue backdrop—no gradients, textures, or additional elements, just a crisp, even tone. I’ll send you the high-resolution original; I’d like the finished image returned at the same resolution, with edges refined so stray hairs look natural and no halos appear. A layered PSD or a transparent-background PNG alongside the final JPEG would be ideal so I can make tweaks later if needed.