Why is the name on the number of these planets green?

I've just discovered some stars and the planets which orbit around them have the number green instead of white like the rest of the name. I would like to know what causes this. Example:

 

Well, these stars seem to be all gathered up and have these similar names which have no numbers on them. i.e.: Terminatus Prime; Councilos Crescent; Senet Riff; Asgardion Sigma.
Unlike the others, which have numbers on them and all-white planet names. i.e.: Epsilon Xi Tau 533; Alpha Draconis 425.
Good theory, by the way.

 

I've noticed this as well, as far as I can tell it's just a new naming system that was implemented some time in the recent past. I like it a lot better, the system names are a lot more unique than they were before.

 

Yes, I like them better too. If you take the time to think of it, most star systems in sci-fi are named like this, whereas the stars in real life are name like they were before Pleased Giraffe Update. But yeah, much more unique. As someone who loves lore and stuff like that it pleases me a lot.

 

That name...

"hey man, where are you from?"

I AM OF TERMINATUS PRIME. BOW TO THE ETERNAL LAVA LORD