Contextual keys?

[rprosperi]

The "a b/c" is in pink (on my machine) which is the same color used for all the Alpha labels and also the (I) and (J) registers, which is unfortunate as that could easily infer these are all somehow related, which isn't the case. A different color was used to clearly indicate these are modal primary keys and no shift is needed; I'm not sure if that is what you mean by contextual keys, but I'd guess so.

A better choice, IMHO, would have been to use another color for these last 3 labels, however the keyboard and surrounding bezel are already quite busy with various colors, so they probably opted to use one of the colors already in use. I think it would have been better to simply label them in white, which would avoid confusion as you've suggested, and certainly would not have confused any user into thinking these were primary key functions. Most likely it was a production/process cost issue that drove using the same pink color already in use.