Where does a colored moon happen?

Answer 1

The Moon itself is mostly dark gray, but we see it as essentially white because the Moon reflects the light of the Sun. The Moon itself is never any other color except during a lunar eclipse.

During a lunar eclipse, the Moon passes into the shadow of the Earth, and the direct light of the Sun cannot reach the Moon. The Moon sometimes appears dark red during an eclipse because sunlight passing through the Earth's atmosphere is refracted into the umbra, or the darker total shadow of the Earth. The red glow that you see on the Moon during an eclipse is the combination of all the sunrises and sunsets all around the Earth all seen at once.

When the Moon appears any other color, the effect is caused by dust particles high in the atmosphere filtering the moonlight.

Answer 2

If by colored moon you mean a lunar eclipse, then it happens when the moon passes through the earth's shadow. When that happens, the moon turns a reddish color.