The AgNO3 solution is colorless. This is due to the absence of any chromophores, which are molecules or parts of molecules that absorb certain wavelengths of light and emit light of a different color. In the case of silver nitrate (AgNO3), the silver ions (Ag+) and nitrate ions (NO3-) do not possess such chromophores. The solution remains transparent and colorless because it does not absorb or emit light in the visible spectrum. According to the data from the CRC Handbook of Chemistry and Physics, the color of a 0.1 M silver nitrate solution is reported to be colorless, further confirming this observation.