>>7540303
Here's a few attempts I tried.
Top-left is the original, untouched. Top-right I made the lights cool and the shadows warm using the blues and oranges you already had on the canvas. Bottom-left is a gradient map on a layer mode above the original and I just thought it looked neat. Bottom-right is warm lights and cool shadows.
Taking some colors already on the page and blending them in other places, subtly, is a decent way to create harmony with colors. I'm a total dummy though so take all this with a grain of salt.