It took me a minute to figure out what you're getting at but I suppose you mean "blue light" reflected from the blue surface of the ocean? The ocean appears blu

It took me a minute to figure out what you're getting at but I suppose you mean "blue light" reflected from the blue surface of the ocean? The ocean appears blue-ish because it absorbs the other colors, not because it is emitting blue light. and the amount reflected is really rather paltry compared to that being emitted from the sun, hence the dark color. I don't think this change in frequency distribution is at all significant compared to LEDs, which natively emit blue light and in common application use phosphors to approximate white light while still largely being composed of the blue part of the spectrum. What this consternation overlooks is that LEDs that more faithfully replicate the spectrum of a black body emitter do exist ("high CRI (Color Rendering Index)" fixtures), they just aren't in common use because they are more expensive. I'm not sure if anyone is working on a high CRI LCD.