Welcome to Dream Views Anna. The color hallucinations and noises you hear might mean you accidentally slipped into sleep paralysis and did a WILD. Kind of jealous now because I haven't had a successful WILD yet.
If you're having trouble with dream control, you can find a lot of useful information here: Dream Control. I might even be able to help with a couple dream control related things.
The reason why your lucids are more frequent after 6am are probly because of your sleep cycle and REM periods by the way. In other words, you are more likely to have dreams in the later hours of your sleep than the early hours. I kind of forgot half the information on sleep cycle and REM though.