LEDs are very particular in how they form the colours and which wavelengths each coloured LED generates. (which might even change based on manufacturer in some cases)
I know @amal did some tests, I’m just failing hard at finding the thread where he posted them. (but sure that @Pilgrimsmaster’s stunning Thread-linking skills will find it in no time! 
)
[EDIT]
after I gave up on searching, the forum “suggested” it to me. here you go:
[/EDIT]
For what I recon, Green Glow powder provides you with the strongest glow in these scenarios, and blue/light blue LEDs are the strongers “chargers”.
Keep in mind that depending on how you charge them, you’ll probably not even see the actual LED lights (i.e. if you are keeping your phone on top of the blinkies)
I’ll post photos here, but might be quite some months before I can get those in. Thanks covid. 