How were you hoping to make sprites more red, without adding sprites or animations or effects?
Effects per sprite would probably be a bigger strain on your system than just adding 1 completely red sprite.
Animations would mean adding a lot more sprites than that.
Also doing it the way I explained you wouldn't have to use WebGL.
If you'd rather use webgl per sprite you could use the tint effect or the hsl effect (maybe there are others that would even suit you better), but it would probably be a lot more intensive for your processor.