This series' Digivice is the Digivice iC, This Digivice can store digimon so you can take your partner anywhere you want. While your digimon is being stored they can also communicate with you. It also allows the Digimon to evolve "Soul Charge" into the next level. This device really isn't used much in the series. In my personal opinion, I don't think that Digivices were even needed in this series. Probable just for show or tradition.
PS: Yes, the Digivices do come in many colors in this season.