Why does everyone keep ignoring that key labels do not have one color, but at least two? Like I said before:
The problem with a single-color keyboard backlight is that we need the labels to have (at least) two different colors: one color for the normal key labels and one color for the Fn/Meta key labels. With e.g. a red backlight you can only get shades of red on the labels (remember, light is additive, not subtractive like paint), which would make it hard to distinguish the two sets of labels.
So a red led is not enough because a monochrome color scheme for the key labels would be a step backwards compared to the Pandora.
Also, I think it is important to make sure that the labels are easy to read when the backlight is switched off.
The problem with a two-colour layout is it looks forced. It looks like a laptop keyboard with no numpad. It is ugly.
I understand the benefit, but that can be had with clever marking as well.
http://img.gfx.no/1044/1044520/a8.jpg
To do better than that, the second function on the keys can be just the outline of a letter, so that is the colour of the actual key, whereas the normal function is the opposite colour of the key.
If you think about it, keyboards have had shift and altgr modifiers that havent been marked in different colours since after the typewriter keys werent the only ones on a keyboard.
As such, the different colour doesnt explain much to anyone. If you already know how to use a modifier, which we cant assume, then its ok already. Aditionally it doesnt do all that much but continue what we have seen on laptops.
I can see the white labels on the pandora in the dark, the blue alternates, not. Also, having Shift modifier stuff on Fn is a _very bad_ choice.
It breaks convention for no good reason.
If there is a two colours scheme, it would be better if the modifier keys were solid colour. Fn on the pandora would be solid blue for example.