This is a comment on Prof. Rolf G. Kuehni's article, How Many Object Colors Can We Distinguish? We give a reasoning why the previously calculated estimates for the number of discernible colors are valid, apart from the possible deviations caused by uncertainty of JND and non-uniformity of color space, without correcting them with a coefficient proposed by Kuehni. (C) 2016 Wiley Periodicals, Inc. Col Res Appl, 41, 539-540, 2016; Published Online 22 June 2016 in Wiley Online Library (wileyonlinelibrary.com).