The aim of the Exoplanet Transit Database (ETD) catalogue is to list all stars that have exoplanets detectable by the transit method. The stars in the Exoplanet Transit Database are displayed in the following colour code (except when a contrasting stars display is requested, in which case only a colour contrast is used) which defines the depth of magnitude variation during transit:
When you highlight ETD objects on the map (see above), dark blue is used for the disc which frames the star if the magnitude filter is being ignored and if the star has a magnitude which would normally be filtered. Otherwise, a lighter blue is used. Note that the discs representing the stars are much bigger for this type of object to make them stand out on the maps.
See the section Dynamic Catalogues to see how to use the Exoplanet Transit Database catalogue.