This information applies to versions 6 and newer
DxO PhotoLab detects if some colors fall outside of the color gamut of the profile you have chosen for your output when exporting an image, and automatically protects any saturated colors in order to retain the maximum amount of detail.
This could produce slightly different results from those seen when editing inside the application; these should only be noticeable if your image has very saturated colors that do not fit in the color space you have chosen to export to.
Please note: you can check for these discrepancies before export by using the soft proofing tool.