Color name "green" was darken since Tcl/Tk 7.6. Because color name scheme was changed from "X11 colors" to "Web colors". Use "lime" to keep colors. See also: http://www.tcl.tk/cgi-bin/tct/tip/403.html Signed-off-by: YOKOTA Hiroshi <yokota@netlab.cs.tsukuba.ac.jp>