The final chapter will include colored pages.
Raw-Paradise's scanning sources come from people who get hold of manga magazines in advance, the announcement will probably be made in this or next week's issue of Shonen Magazine.
It all makes sense people! No color pages so far (because they were saving them for the end!), the artbook coming out simultaneously, it all fits! =DDD
Thank you to EVERYONE who poked me about this (I got poked on LJ, on Twitter, thanks you guys! XDD)
Update: It's official now, here is a preview from the last page of Chapter 231, confirming Chapter 232 as the final chapter with color pages and extra pages:
Thanks syaoranmew and cutesherry for letting me know about this! =D Credits for the image go to Heiji-sama.