However, the default light color is white. In real life, there are very few lights that are pure white. Perhaps a welding spark...
No, it's important to set your lights to good colors. The sun light color also needs to be given a warmer color.
So, what you want to know is "What color looks good?"
You could try studying this lighting chart, even sample the rgb color using the eyedropper in your preferred photo editor.

Try these light colors as a starting point in your next interior:
Kitchen design and model by the award winning Dan Stronge.
In the example below, the IES lights in the under cabinet lighting has been changed... but that is not important, it's only meant as a study in light color.
Remember that the exposure of your camera for interiors is very important. Also, post production in a photo editor will always do wonders to enhance a raw render and take it to the "next level". Here is a real photographic example of a cloudy day with the interior incandescent lights near the stairway.