Nice and soft.
This song really made me relax. It's just put together so well, and everything is so smooth that it blends together into a tune of tremendous quality.
One thing I really liked about this was that, even though it was repetitive, it was a GOOD kind of repetitive (if that makes sense, lol). I also really loved the light rain sounds in the beginning. That was a perfect little touch.
This was a really awesome song overall, and it's title fit well. I could imagine the clouds clearing away slowly and a beam of light casacding through and making a rainbow. Nice job!