Night lighting

I am trying to make an area that has maybe moonlight (not really the moon but just night type effects) I can create some stars and a light, but do I change the light color to blue ? Suggestions please, or tutorials.

With the lamp selected, Just go to the shading section in the buttons menu (that’s the gray circle), then click on the subsection that looks like a lightbulb. you can adjust the color of the selected lamp from there.