You would need to change the code for that. There's no configuration option.
In the version up to 4.8 that I use, the icons were like this and it was interesting because the background changed color, but the logos didn't. If possible, what files and codes should be worked on to see this. If possible. I already did some customization. I changed the logo, I already have the traccar on the reverse ip with sm ssl domain and now I just want to change that in the icons. I've seen some improvements where vehicles look like uber's on the map. Really good. Thank you for your attention.
Usually the vehicle icons are green when they are moving, and red when they are disconnected or stopped. I wanted to know if there is any configuration that I can do so that the white background that is the circle has these colors and the vehicle logo is white or without color.