Can a colorimeter prove a faint color isn't actually blue?

[goku]

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 are wavelengths right.
so can we use a colorimeter or anything to get some kind of data in wavelength suggesting this can not be blue.

is there any other way? i don't really know what the compound we r looking at.

 

[madmike159]

Maby you would be better off putting this in the chemistry section. There are devices that will measure wavelength for you, but I don't know what to suggest.