The main character designer for Season 6, Orpheelin has released on her DeviantArt account a new promotional picture of the Spies used for 2012 TV Market in Las Vegas. The art style of S6 has a little bit simplified haircuts (it´s most significant on Clover´s hair). About the color of hearts on their Bungee belts - Orpheelin said the following:
"Concerning the belts, I personnaly color them with purple/pink because I like it and it's the references i've found in the guide-chart of TS. But most of time, I'm not the colorist, I only do the lines. I don't know witch references the production gave to the Korean studios for the colors on the belt."
Most llikely they will remain grey as they were in previous seasons but we would welcome this cute pink change.