This is a scene from a film I shot awhile back. We were on location on the second floor of an apartment building with a north facing window at about 2:00 pm, with very blue afternoon skylight coming in the window. The script called for this scene to be at about 6:00am with the girl sitting near the window and we had nowhere we could really put any lights.
After some discussion with my gaffer we came up with a simple solution. Luckily we had a tree outside the window, and we managed to use a c-stand arm to strap a 500 watt (or a 1K, sorry cant remember which) tungsten light to a branch. Then we switched to daylight stock (7205), let the blue skylight get closer to white, and the tungsten light to give us some orange morning light. So this is the color you get when shooting tungsten onto daylight stock.