Scary Yellow Primer

So I actually bought my paint the other day to turn my wall into a yellow burst of happiness!  I bought Benjamin Moore High Gloss Advance in Bold Yellow.  At the store the associate suggested that I tint my primer as close to that color as possible to help with coverage.  So I took my primer back to Home Depot and got it tinted Bold Yellow, although the paint person told me that it wouldn't be as dark as the actual Bold Yellow.  I slapped up my first coat of yellow primer on the wall today and now I'm a little nervous!  I'm hoping that the actual paint will be a bit darker.  I'm going for sunny; not childish!