I'm red, blue, purple, and green

Question: I'm red, blue, purple and green.
No one can reach me, not even the queen.

What am I?

Question: What fish only swims at night?

Question: What kind of mouse does not eat, drink or even walk?

Question: What has a bed that you can't sleep in?

Question: What tastes better than it smells?

Question: What goes in the water black and comes out red?