I feel like I should know this by now but I don't and am kinda ashamed

[PSYKOSIS101]

What do the emmissives do in the appearence color options?

I can really see any difference, BUT apparently Chroma's 'energy colors' for Elemental Screamm now uses it and not his Energy color. That's about all I took from it...

[CaptainMinty]

There's some lights on frames. Oberon Freyarch for example has lights on his body. Those colors change those lights on the warframe. This allows the energy color to be completely customizable for Chroma and other abilities that have elements tied to the color. 

[PSYKOSIS101]

1 minute ago, CaptainMinty said:

There's some lights on frames. Oberon Freyarch for example has lights on his body. Those colors change those lights on the warframe. This allows the energy color to be completely customizable for Chroma and other abilities that have elements tied to the color. 

Thank you.

I'm assuming secondary energy color functions the same?

so I'm looking for noticible things, but in actual fact they are more subtle options

[CaptainMinty]

Secondary energy colors come from putting Forma into stuff. Gives a little more customizability to our energy. Fashion after all, is truly wonderous. Wisp's Sol Gate is absolutely fantastic with multiple colors. Some frames though, don't really get it too well. I haven't been able to notice much for Oberon. (I really like Obro. Versatile and strong.)

[(NSW)Fiftycentis]

Also, "secondary" color needs some testing when you are deciding it because it doesn't work consistently for all abilities https://youtu.be/ha0vmfgS8Yg