in my chemistry lab we had a kind of color test. the thing was supposed to come as blue according to the lab manual. . It did not. to me there was no color.however my teachers forced me to believe what i was looking at was blue,supposedly "it is very faint". that was not mentioned in the manual. but colors means wavelengths right. so can we use a colorimeter or anything to get some kind of data in wavelenght suggesting this can not be blue. is there any other way? i don't really know what the compound we r looking at.