Hello chuchengbing,
To change the background color of elements in the Axis GUI, I would take a look at "frame" widgets in the axis.tcl file. The frame widget is used to group things together in a box. You will have to add a color attribute to these.
The first one you can specifically look at is on LINE 469:
Code:
frame .toolbar \
-borderwidth 1 \
-relief raised \
-background "green"
Replace it with the color of your choosing... You can also use hexidecimal color values.
There are many other frame widgets which you may have to add a background color attribute. Hopefully this gets you pointed in the right direction.
I am not sure of what you mean by the "configuration selector" ?