If I use the "Orange 4" color in my spreadsheet, I get an error when printing:

Error: /undefined in 0.5:
Operand stack:
   1   0.8
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--  
--nostringval--   2   %stopped_push   --nostringval--   --nostringval--  
--nostringval--   false   1   %stopped_push   1   3   %oparray_pop   1   3  
%oparray_pop   .runexec2   --nostringval--   --nostringval--   --nostringval-- 
 2   %stopped_push   --nostringval--   --nostringval--   --nostringval--
Dictionary stack:
   --dict:1028/1476(ro)(G)--   --dict:0/20(G)--   --dict:92/200(L)--
Current allocation mode is local
Last OS error: 2
GNU Ghostscript 6.51: Unrecoverable error, exit code 1

To reproduce this error:

* Open a new Open Office Spreadsheet
* Select multiple cells
* Right-click on the cells and select "Format Cells"
* Click on "Background"
* Select "Orange 4" (second row from bottom, leftmost cell)
* Click "OK"
* Print the document

I am running Red Hat 7.2 with latest updates, and Open Office 641C downloaded
and installed (using network install) as binary.

Note: If I edit the resulting postscript file, and find the text "0.5:" (note
the colon) and remove the colon, the file prints perfectly.