I can right click and pick "color...", then it is obviously stuck in the background doing something. I can still type a command into the command window, but that will hang (including "exit" or "close"). How do I fix this? I'm running on Linux CentOS7 with -softwareopengl set.
EDIT: If I wait about 10 minutes, it returns with a bunch of red java error text. It's on another machine, so I can't paste it in, but it starts with "Error using matlab.ui.internal.dialog.WebColorChooser/show (line 72)", then something about "failed to initialize IPC".