Deep is a universal brown that suits cool blondes, light brown to deep brown or black hair. Product should be applied to brows that are clean, dry, free of skincare, and following face makeup/powder application.
This brow pen is the best that I have used. I don't like a "made-up" brow look, and this pen fills in sparse spots beautifully and adds just the right color and emphasis. The pen tip itself is a bit firmer than most which is what I have been looking for because the control is much better than with the looser/softer versions. I have worn it in the pool and to the US Open (where you sweat to death), and it has stayed in place. I will re-order.