Generally speaking, cellular components, such as NADPH, nucleic acids, amino acids, and proteins, intrinsically autofluoresce – meaning they emit light that has been absorbed. While the Golgi apparatus does contain these autofluorescing components, unfortunately, there is no accredited publication that alludes to the color of the Golgi apparatus. 

Instead, staining techniques using fluorescent markers, such as C6-NBD-ceramide, can be used to visualize the Golgi apparatus in live and fixed cells. When excited at 466 nm, C6-NBD-ceramide will exhibit green fluorescence at ~536 nm.