7 cards where the cards have color indicators and the number of colors is 3

Huatli, Poet of Unity // Roar of the Fifth People (The Lost Caverns of Ixalan #189)
Huatli, Poet of Unity // Roar of the Fifth People (The Lost Caverns of Ixalan #189)
Megatron, Tyrant // Megatron, Destructive Force (Transformers #12)
Megatron, Tyrant // Megatron, Destructive Force (Transformers #12)
Nicol Bolas, the Ravager // Nicol Bolas, the Arisen (Core Set 2019 #218)
Nicol Bolas, the Ravager // Nicol Bolas, the Arisen (Core Set 2019 #218)
Optimus Prime, Hero // Optimus Prime, Autobot Leader (Transformers #13)
Optimus Prime, Hero // Optimus Prime, Autobot Leader (Transformers #13)
Soundwave, Sonic Spy // Soundwave, Superior Captain (Transformers #14)
Soundwave, Sonic Spy // Soundwave, Superior Captain (Transformers #14)
Tetzin, Gnome Champion // The Golden-Gear Colossus (The Lost Caverns of Ixalan Commander #13)
Tetzin, Gnome Champion // The Golden-Gear Colossus (The Lost Caverns of Ixalan Commander #13)
Ultra Magnus, Tactician // Ultra Magnus, Armored Carrier (Transformers #15)
Ultra Magnus, Tactician // Ultra Magnus, Armored Carrier (Transformers #15)

The arc of my blade has carved a path of light to the end of these results.