COLORATION IN ROOM IMPULSE RESPONSES
http://www.acoustics.hut.fi/asf/bnam...papers/o23.pdf
The above is a link to a well thought out paper on the subject of Coloration. The definitions at least should keep this thread short and sweet.
For those who wish to learn more on the research side of subject I would encourage more readings as there are numerous papers in the AES Journals by E Geddes, M Schroeder and and many others.
It should be noted these papers are not pure academia but serious scientific investigations that often lead to real world applications.