I just tried to open Imagemagick in trinity and nothing happened. So I edited the menu, found the executable and ran it in a terminal. This is what it came back with:
:~$ display.im6 display.im6: color is not known to server `FOREGROUND': No such file or directory @ error/xwindow.c/XGetPixelPacket/3064.
I switched to Mate desktop and Imagemagick ran as normal.. So it is a trinity issue..