There already is freshcode.club

A dutch company seems to have solved that problem (color recognition) by using a mix of mostly green and some red leds.
They use green leds because the human eye is most sensitive to green light in the dark, so the green light gives the best visibility at night. But to enhance the color recognition (which is basically zero with the almost monochromatic green light from the leds) some red leds are added.
Here you can find a nice presentation (with explanation) of the product.

I've been working with SAP for 9 years now (first as a programmer, then as system engineer). If the original poster (your user A) says SAP software is only decently supported on MS platforms then I would also say he doesn't know what he is talking about.

The most used db for SAP installations is probably Oracle. Internally SAP uses SAPDB/MaxDB which is an open-source cross-platform enterprise level DB.

Although there were some server-side products that have been windows only in the past (ITS, IGS, ...) this is quickly changing now : SAP even supports Linux on Power for some parts of its software ...