loss of color and density

I made a slideshow and burned in to DVD but loss of color ( it seems less blue ) and density was kind of disappointing! I did made gamma adjustment in Quick Time Pro but still not happy.

Have a look at this DVD export tutorial. It is outdated but contains some useful information for exporting to DVD. Colors are covered in section 1.4 .

Thank you for your response. One thing I noticed was when I burned my Quick Time movie to DVD using Toast 11 it produced closer image quality to Quick Time movie than when I used iDVD (7.1.2)! iDVD produced a bit contrasty and may be darker images which is more pleasing when you watch the slideshow on TV.
Do you have any thoughts on that??

I guess that he colorSynch chain is broken somewhere. Therefore in different workflows you will get different color results.