Eyebrows are an interesting facial feature that we often try to tweak just a bit.  My sister shaved 1/2 of each brow (from the inner eye to the top of the arch) and I was quite by surprised that she had the courage to take such a bold step.  Over the years I've tweezed hairs along the brow line to sharpen the arch a bit but as I grow older, I find the need to tweeze has ridden off into the sunset.  I've also discovered that as I age, darker brows tend to add a bit more interest to my face.  For years I used a taupe color that worked quite well but it is no longer manufactured so I've experimented with various shades of pencils or powders and seem to find they are either too dark or too brown.  But today I've been delighted to find an eyebrow pencil that is promoted as being capable of matching the pH of the eyebrow hair follicles so that the color adjusts from light to darker, warmer to cooler tones based on the hair follicle.  Now if it only works that way!