1) Adujst Options -> Account -> Unlock Full Play
2) Queue for a normal game and cancel the queue before a match is found
3) Open the color challenge that you want to complete
4) Click play on the challenge and it will let you queue for the colors
*NOTE* -> You must queue for a normal after each color or you will get the same error.
A current work around to this issue:
1) Adujst Options -> Account -> Unlock Full Play
2) Queue for a normal game and cancel the queue before a match is found
3) Open the color challenge that you want to complete
4) Click play on the challenge and it will let you queue for the colors
*NOTE* -> You must queue for a normal after each color or you will get the same error.