How is "cyan" pronounced and where is the stress?
Note that the question covers both the pronunciation of the vowel and the position of the stress. I edited this post to quote dictionaries, so it shows the necessary amount of research.
I'm guessing then that the close-voters think it is a "question that can be answered using commonly-available references" but in fact, the dictionary entries are known to present an incomplete picture of the situation because there are evidently various people who pronounce this word with stress on the second syllable. You can see some of them in the comments and the answer to this question; I also added links to some examples which were then edited out in a later revision of the question.
Even if the pronunciation with stress on the second syllable is non-standard (which seems very likely), I think it deserves some explanation, and the question should be re-opened so that it's possible for the original poster to get an explanation.
Edit: I edited the question and it is now re-opened. Thanks to everyone for voting on this.