If u want to see in your Empire modification you need to look into this code.

There are some parts.
For example, I want to write the name of empire like it was done (Boss in yellow color). It is done by copying from any different from Stellaris document to Stellaris writing option.
The code:
YBoss!
Y - means yellow, then it cames to the text that you want to paste into Stellaris.
Watch out! Look the code through your PC, mobile Steam doesn’t recognize some elements of the code.

And yes - you can do it with your nickname! :)

There are some color codes that I've found from the different source:


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player Boss