Depending on your color space, black can be the absence of all color (R=G=B=0) or the presence of all colors (C=M=Y=100).
So perhaps the question also depends on the medium. In our case, viewing forum pages on the web in RGB color, black would technically be the absence of all colors.
This is complicated somewhat by the fact that it is unlikely that even R=G=B=0 will provide a "true" black that contains no other color contamination, primarily because of the imperfect ability of a CRT or LCD to produce a true absence of color.
Therefore, I'd maintain that in the context of this forum, black would indeed be a color.
So perhaps the question also depends on the medium. In our case, viewing forum pages on the web in RGB color, black would technically be the absence of all colors.
This is complicated somewhat by the fact that it is unlikely that even R=G=B=0 will provide a "true" black that contains no other color contamination, primarily because of the imperfect ability of a CRT or LCD to produce a true absence of color.
Therefore, I'd maintain that in the context of this forum, black would indeed be a color.