I think the color might reflect the properties of the suit, for example... Green = Stealth.
So maybe other colors will do different things or perhaps it is orange/red when not activated, the green when stealth mode is activated?
It'd be good to see the Spidey/Iron Fist in the TRU wave sporting the different color.
And if anyone doesn't know, currently Spidey has a job in a big think tank as an inventor, which gives him access to what he needs to create these new suits.
After all, Peter Parker is one of the smartest men in Marvel, it's just not been utilised in stories much.
New box set... Peter Parker, 3 x "Big Time" costume variants!