The story with the colours, for those who missed the earlier discussion, is something like this:
There are a couple of fundamental approaches that one can take in the design of this sort of dress digital watch; Thematic, where the entire dial is given over to a single graphic design (e.g. commemorative, advertising, souvenir), and Technical, which focusses on the functions of the display and pushers. The problem with the Thematic approach is getting everybody to agree on the same theme. However the Technical approach risks delivering a watch no different to a stock Technochas Elektronika. Opinions were split over the use of a special logo, so the natural alternative is to express the forum identity through colour.