Tai's Crest and Color
Tai owns a crest that represents courage. He found this crest in a cave when he and the others were running to hide themselves from Etemon's attack. That was in episode 15. His first action that proved his courage was in episode 20. Sora was taken by Datamon and Tai risked his own life to get through electrical wires just to save Sora. And also at the end of the episode 20 Greymon finally digivolved into MetalGreymon with Tai's help and of course with help of the crest. When Sora told him what his crest means I think he was really impressed by it.
The crest is in orange color and when it glows it's also orange. His digivice also change color to orange when his Digimon digivolve into mega level. So I found the meaning of orange color to compare it with Tai's
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) ... I think I can see Tai in it. Can you?