ACHROMATIC

Another type of color scheme is an "achromatic" scheme, which includes only, black, white, or grays. In Greek, means "none" and chromo means "color," so achromatic means, "no-color." A lead pencil drawing is achromatic, as are charcoal drawings and black and white photographs. Minimalism style has predominantly ‘achromatic color scheme (Plate13 A, B & C).

(Read more: http://en.wikipedia.org/wiki/Color_theory#Achromatic_colors ; May 31, 2012)

(SourcePlate10.A&B:http://www.google.co.in/search?hl=en&pq=achromatic+colors&cp=20&gs_id=gr&xhr=t&q=Minimalist+furniture+
colors&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&biw=1350&bih=555&um=1&ie=UTF8&tbm=isch&source=og&sa=N&tab=wi&ei=5
_vGT6bnEcOciQft_uWpDg ; May 31, 2012)
(Source Plate10.C: http://colorbay.com/achromatic.htm ; May 31, 2012)

Warm [] and cool [] colors application by analogy to feelings 

No color physically cool or warm. It is psychological feeling that makes us feel cool or warm. In a room for meditation or study the environment has to be cooler (feeling). On the other hand a place for discotheque environment has to generate warmer feeling. Warmer environment creates excitement.