Have your barber trim your eyebrows so that they grey there is less noticeable.

As you get older, if you opt not to dye your hair, then you will just have to accept the grey. Gosh, I've even had grey nose hairs! And, grey pubic hairs! There is a big "V" in the center of my chest with grey hair. Frankly, I would gladly accept all grey hair if I could get it to grow on my head so that I would not be bald! I wish the hair on my back was grey instead of black so that it was less noticeable! I now have so much grey hair that dyeing the hair on my head would be a waste. I'd have to all the hair on my body dyed!!!

There are special kits to help you dye hair in hard or small places. Buy one of the beard dyeing kits - those should have the small brushes needed to make your eyebrows darker.