Hi, It's an annoying bug of TikZ with ConTexT: in some circumstances, the content after a tikzpicture is coloured. I refered it [here](http://www.ntg.nl/pipermail/ntg-context/2014/077374.html), and it's also present in the latest version of the minimals. Anyone could check it if he/she finds a bug. Thanks, Xan.