In the Warhammer 40,000 universe, Imperial Knights are typically painted in a variety of color schemes, depending on the household or chapter they belong to. Some common Imperial Knights color schemes include: Imperial Knight Errant: Imperial Knight Errants are typically painted in a red, white and gold color scheme, with the red representing the knight's courage and the white symbolizing purity and nobility. Imperial Knight Crusader: Imperial Knight Crusaders are typically painted in a blue and white color scheme, with the blue representing the knight's loyalty and the white symbolizing purity and nobility. Imperial Knight Warden: Imperial Knight Wardens are typically painted in a green and white color scheme, with the green representing the knight's strength and the white symbolizing purity and nobility. Questor Mechanicus: Questor Mechanicus are typically painted in a dark red and silver color scheme, with the red representing the knight's loyalty to the Adeptus Mechanicus and the silver representing the knight's advanced technology. Questor Imperialis: Questor Imperialis are typically painted in a dark green and gold color scheme, with the green representing the knight's loyalty to the Imperium and the gold representing the knight's nobility and honor. House Cadmus: House Cadmus is typically painted in a black and gold color scheme, with the black representing the knight's stealth and the gold representing the knight's nobility and honor. These are some of the typical color schemes for Imperial Knights, however, players are free to paint their models as they please, it's not uncommon to see a wide range of color schemes for Imperial Knights, as players are encouraged to personalize their models.