To be fair, Caterham were the ones who went and made it needlessly confusing last year. ART started the season with the yellow and green livery, and Caterham began with white and red. Then they went and changed it to green and yellow to reflect their relationship with The Team Formerly Known As Lotus. I don’t really know why that couldn’t wait until 2012.
To be fair to Caterham, Group Lotus sponsored Renault F1 under a JPS-style livery (gold and black) but sponsored ART (and KV Racing in IndyCar) in Team Lotus’ green and yellow. The naming war had already started and I felt Group Lotus was “stealing” Lotus’ livery to challenge them. But as Caterham had started the season in an AirAsia livery, they worsened the situation by using “their” livery. I saw it like ART copied Lotus’ livery before they actually had it.
Now, with the dispute settled, I believe the agreement included a part regarding liveries – Caterham yellow & green, Lotus black & gold.