Well, colour contrast is not always necessary rather something that you create through the whole project.
Hence, sometimes you won't want to use different colours in your scene because it is not needed and some other times you will need to do so because that's how you have envisioned that sequence within the project.
To answer your question, there are so many ways to light that shot with the lights that you have.
1) You could throw the 1.2K through the left or right window with a 1x1 frame with china silk or light grid cloth to soften the light and peacock blue to create a "blue / green" feeling.
Then you could place a practical (lamp) on the opposite side with a dimmer and gel it with bastard amber.
That way you would have two different colours which will help you create that 3D feeling.
You might want to add the 650W somewhere behind the door the character opens so you have a bit of light there.
Assuming that you will shoot close-ups, you can use then the Kinoflos (with either depron or frames to soften the light) to enhance the light from the wide-shot.
2) If the windows are very close, you could bounce the 1.2K off a Ultrabounce or 1.5x1.5 poly which will create a very soft ambient light, which you might want to flag off the walls or not!
If you flag the light off the walls, you could, again, add the practical lamp.
If you don't flag the light, you could add a bulb in the middle of the table (hanging from the ceiling ), dimmed and on screen.
3) You could always just use a china ball above the table with black around it and leave everything black but the table.
1) Throw the HMI through the window straight to the ground and leave the bounce be the general light, or if you can, bounce it off the table.
Use the kinos for the close-ups
There are endless possibilities!
Have a good day.