The majority of the color is in the red and yellow. Just pull the cyan and blue down and lighten or darken to your taste.
I pulled the green, magenta, cyan, and blue down in the candle shot. You can play with it a bit more to completely remove the color in the windows, I just salted to my taste.
I just pulled the cyan down in the kitchen shot and should have pulled the blue down as well to fix the curtain and counter top.
It took longer for Photoshop to open than to play with the hue/saturation tool for both photos.
Edit I went back and pulled the blues down in the kitchen shot.
Before
After
Before
After