I have links to persons that are displayed once in blue or once in green. I have not found anything in IMatch Help about the meaning of the colours.
What do the different colours mean?
Blue = links.
Green = real annotation.
See Annotations (https://www.photools.com/help/imatch/anno_basics.htm) and People (https://www.photools.com/help/imatch/people.htm) for all the info.