color control

Hello:

   Here is my question about how to let the color more bright.

ex. the data structure is below

   (XAxis,YAxis)-> temp on a DisplayImplJ3D 
    
   dpys[0].addMap(new ScalarMap(RealType.XAxis, Display.XAxis));
   dpys[0].addMap(new ScalarMap(RealType.YAxis, Display.YAxis));
   dpys[0].addMap(new ScalarMap(Temp, ?)); // use single color to show
various temperture
   dpys[0].addMap(new ConstantMap(?,?)); 

  If there is some way to let the whole simulation model more bright in
black bcakground.
Because the final color will control by " dpys[0].addMap(new
ScalarMap(Temp, ?));". The whole model will change into more grey and
unclear.  or Is it possible to change the the scale color and structure
color to black on other color background?

thank you 

shinta