There's a Red, Green, & Black. Why not a Blue?

[hunter_peterson]

But electricity isn't really blue... maybe White makes more sense? Kind of sterile and lightning is white. This is all kind of pointless, I realize... also might cause confusion because of the whole Emotional Spectrum whatsit.

[ArnoldoAAD]

But electricity isn't really blue...

tell that to superman

[Daggdag]

Cyborg is not artificial......He is organic, with mechanical parts......

[Zeeguy91]

Well, I's think its because the Red and the Green are part of the "Life Web", and even though there are artificial type beings, I wouldn't qualify them as making up another category of life. Mechanical or technological beings aren't even technically "alive." Yes they think and are sentient, but they are manmade, not made by nature. Anyway, all those characters you mentioned didn't start out the way they are now; they started out as regular people:

Robotman lost his body in an accident, so his brain was transplanted into a robot's body
Cyborg is pretty much the same story, but he just didn't lose his whole body, he lost parts of it, which were then replaced by cybernetic implants
Livewire suffered from an accident, which made her what she is today; and
The Bride only has a cybernetic implant, the "Gazer"

All of these individuals are still part of the Red. They have only received some technological implants or suffered an accident, so I don't think we should create a new category for them.

[Dr. Hurt]

Huh...when I thought of the Blue, I thought more of flying beings or something involving the wind.

On one hand, that could be interesting--but, unless someone has a good story with that, it seems like added detail for no real reason.

I thought of sea life, but i guess that's part of the red too.

Also OP, there's the spoilers:

Bat

end of spoilers,
the greatest force of all. You dont **** with the spoilers:

Bat.

end of spoilers

[FHIZ]

Because this isn't the lantern corps

[MajorHoy]

I doubt they will add anymore colors to the life-web. They have the Red (Animal Kingdom), Green (Plant Kingdom), and Grey (Fungus Kingdom), and The Rot (dead matter). I doubt they'll mix technology with elemental-magic story elements.

Nothing for rocks / minerals?

And why couldn't blue be for water?

. . . now i havent read those comics but i heard that Aquaman encounter something called "The Clear" which was something like the Green of fishlife
anyone knows anything on that?

Didn't either Barry Bonds or Roger Clemens get in trouble for using "The Clear"?

[Theozilla]

Nothing for rocks / minerals?

And why couldn't blue be for water?

Didn't either Barry Bonds or Roger Clemens get in trouble for using "The Clear"?

Oh, well the classical elements already have their own Parliaments: the Parliament of Stones (Earth), the Parliament of Waves (Water), the Parliament of Vapors (Air), and the Parliament of Flames (Fire); there is even a Parliament of Worlds.. They just don't have their own "color"/life-web likely because they represent the abiotic elementals.