Seems to be a problem with your X11 installation.  Googling for "unknown color name" produces an apparent solution:

Tk + unknown color name "Black" - Ubuntu Forums

--Eric

                        Eric Pettersen

                        UCSF Computer Graphics Lab

                        http://www.cgl.ucsf.edu



On Sep 3, 2008, at 2:42 AM, Jean-Paul Armache wrote:

Hello,

Due to some long needed changes, I have switched to CentOS 5.2.
Everything was fine for some time, but then, when trying to run Chimera,
I encountered the following error (applies to all versions of Chimera on
my harddrive - 1.2470, 1.2492 and 1.2540):

Traceback (most recent call last):
 File "/opt/chimera/chimera1.2492/share/__main__.py", line 65, in ?
   value = chimeraInit.init(sys.argv)
 File "/opt/chimera/chimera1.2492/share/chimeraInit.py", line 302, in
init
   splash.create()
 File "/opt/chimera/chimera1.2492/share/chimera/splash.py", line 17, in
create
   splash = Tk.Frame(root, background="white")
 File "/opt/chimera/chimera1.2492/lib/python2.4/lib-tk/Tkinter.py",
line 2375, in __init__
   Widget.__init__(self, master, 'frame', cnf, {}, extra)
 File "/opt/chimera/chimera1.2492/lib/python2.4/lib-tk/Tkinter.py",
line 1862, in __init__
   self.tk.call(
_tkinter.TclError: unknown color name "white"


I have tkinter installed, python running properly, everything
functional. Except for that. Do you know what could be done to fix it?
Best,

Jean-Paul

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