SCART to VGA adapter - green picture
It looks to me that your DVD player is outputting YPbPr component video instead of RGB. If you look at the pinout listing on Wikipedia, you'll see that pin 11 carries either green for RGB, or luminescence (Y) for YPbPr. (It also notes that the YPbPr mode is a non-standard extension.)

I'd check your DVD player menus to see if you can change the output mode.

Disclaimer: I have no experience with SCART and little with component video so I may be way off here.