"Rainbow in the Dark" is a song by Dio
One of the great depression metaphors, in this song lead singer Ronnie James Dio is feeling isolated and trapped, unable to release the tremendous potential inside him - like a rainbow in the dark. Dio has mentioned his time as Black Sabbath lead singer as inspiration for the lyrics. Along with Sabbath drummer Vinny Appice, he formed Dio in 1983.
Along with "Holy Diver," this is one of Dio's most popular songs. It's heavy on keyboards, which helped make the song more accessible to a Pop audience, something Van Halen did with great success on their album 1984.
VH1 named this #13 on their list of the Greatest Metal Songs. (thanks, Michael - Toledo, OH)
In Rock Band 3Edit
The song is widely considered the hardest song on guitar in Rock Band 3 due to the extremely fast HOPO sequences in the solo. Even seasoned Rock Band veterans will have trouble passing the solo.