Okay, Guess Again: Look at All the Pretty Colors

I'm having fun with Sunday's post asking you what it is and I'm really surprised no one has guessed. So here it is again with two clues.

Here's the photo:Here are the clues:
Clue #1: Think 1970s disco song.
Clue #2: Katherine Helmond and Billy Crystal starred in this 1970s sitcom.

Happy guessing!