Flourescent orange cannot be easily simulated with RGB. You might get a more accurate match if you callibrate your monitor or use a colour managed workflow, however.
Unfortunately, many Pantones are misrepresented on screen.
Edit: Hi Scott.
Wel like previous posters say, there are alot off spotcolors dat cant be mached on screen or on a digital proof.
If you dont like the translation, you can change it to whatever you like in Illustrator.
But the reality is still the printed color in the end.
Yes, you're right, I can easily translate my own color. But then, what's the point of a preset color library if it's so inaccurate? They're pointless if they can't approximate chip colors. I just wonder why there is such a huge difference. Is it a mistake?
Its as accurate as it can be considering the differences between RGB and CMYK and Pantone. Remember, RGB is really only suitable for screen based graphics - light emitting devices. CMYK is best for 4 color printing processes. Pantone colors are 'spot' or single colors mixed to get that result.
Alot of confusion happens because the three different systems do not easily 'convert' and people get caught when the printed result bears no resembelance to the screen result.
For really best results get your self a Pantone Color Bridge book, select your Pantone color, and then use the RGB or CMYK breakdown they recommend for best color match.
Fluro colors will never print well as CMYK or RGB although they my view well on screen.