Davis' ArmorEggs and Color
Davis has two ArmorEggs that really belongs to him (so I'm not going to talk about the ArmorEgg of Miracles). His ArmorEggs are actually from Tai's and Matt's crest. Courage and Friendship. In his first episode he gets his ArmorEgg of courage. I think we can all agree that Davis showed courage throughout the whole season and movies also. Maybe it wasn't that obvious like it was in Tai's case, but still. Davis gets his second ArmorEgg (ArmorEgg of friendship) in episode 11. He decided to help his friend to get his Digimon back.
And about the color. I don't know which color is actually his but he has a D-3 digivice in blue color. So I suppose that blue color defines him. But I take a look at both colors - blue and orange.
Color Orange: Orange is energy, enthusiasm, 'get-it-done' attitude, and balance. It typically symbolizes Hinduism, Buddhism, happiness, energy, balance, heat, fire, enthusiasm, flamboyance, playfulness, aggression, arrogance, gaudiness, over-emotion, warning, danger, autumn, desire, Sagittarius (star sign), and September.
Danger, desire, energy, enthusiasm, happiness, playfulness, aggression (a little) ... Just like I saw a little Tai in it I also see a little Davis in it ;D
Color Blue: Blue can symbolize seas, men, productive, interior, skies, peace, unity, harmony, tranquility, calmness, trust, coolness, confidence, conservatism, water, ice, loyalty, dependability, cleanliness, technology, winter, depression, coldness, idealism, air, wisdom, royalty, nobility, strength, light, friendliness, peace, truthfulness, love ...
Okay, I can also see Davis in it. It's really difficult to decide which color is for who because I think that every color represents a little piece of a person. I think that you can find every person in every color.