Excellent.
Add a Channel Mixer layer, and enter these values:
Red channel: 0, +100, 0
Green channel: 0, +35, +65
Blue channel: +100, 0, 0
Then mask on. Around the bulk of the handle, you shouldn't need to be precise - the CM layer shouldn't affect the wall colour.
But around the fingers, you'll need to be VERY precise, of course.
IMPORTANT: After masking around the fingers very carefully, then lower the brush opacity a lot, eg 5%, and paint gently onto the skin to replace the pink cast with blue cast. This step is really important.
Here, I've done the top half to show you: