The three rainbows were Seven's "Friends". They are Kevin, Rainbowlina, and Big Bob and appeared in Ten Again. Voiced by David Holt. They are mostly seen as an object.
- There is an Alphablocks Episode with the name "Rainbow".
- The Rainbows were seen earlier in Numberjacks.
| Numberblocks characters
Zero, One, Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten, Eleven, Twelve, Thirteen, Fourteen, Fifteen, Sixteen, Seventeen, Eighteen, Nineteen, Twenty, Twenty-One, Twenty-Two, Twenty-Three, Twenty-Four, Twenty-Five, Twenty-Six, Twenty-Seven, Twenty-Eight, Twenty-Nine, Thirty, Thirty-Five, Forty, Forty-Five, Fifty, Sixty, Seventy, Eighty, Ninety, Ninety-Nine, One Hundred
Big Bad Square, The Terrible Twos, Octoblock, The Three Threes, Octonaughty, Step Squad, The Four Fours
Thirty-One, Thirty-Two, Thirty-Three, Thirty-Four, Thirty-Six, Thirty-Seven, Thirty-Eight, Thirty-Nine, Forty-One, Forty-Two, Forty-Three, Forty-Four, Forty-Six
Quarter-Pi, Half-Pi, Pi, Pau, Tau, Tro, Rho
Flapjack Snaffler, Blockzilla, Big Tum
Fluffies, Squarey, Numberblobs, Aliens, Rainbows, Flatlanders, Alphablocks