Ok, i found the culprit line:
sdk/cbeditor.cpp:1497
control->MarkerDefine(DEBUG_MARKER_HIGHLIGHT, DEBUG_STYLE_HIGHLIGHT);
control->MarkerSetBackground(DEBUG_MARKER_HIGHLIGHT, control->GetCaretLineBackground());
the color loaded here is not the correct color. I don't know why, and debugging scintilla code is quite a pain. Anyway i don't think this is the correct color for this line. I would like to differentiate between the "active carer" line and the "current debugger position" line.
For this my suggestion is the attached patch, to add a color in the color manager...
if this discussion comes to a end i will make a ticket