When it is switched off, the bulb is silver. As soon as it lights up, it emits a rich yellow (amber). It is the nicest looking choice for the clear lenses as it does not leave a yellow/amber blob when turned off. Not cheap, but on the other hand, very visually appealing. The sophisticated replacement for all models with original clear lenses, and for other models it needs one of the small pin filed off, a modification which takes only a few seconds to do.