Use the right shade
For natural looking brows, you can use the shade which is similar to your brow color, and these are divided into two types—ash and warm. Neutral shade would benefit you if your brow color falls under ash and warm brows would benefit from either auburn, golden or red shades.
Groom brow to perfection
There are some rules for eyebrows i.e. you should try to shape your brow first before filling it in. If you have thick, full eyebrows, you need to pluck them or pull them but make sure that in order maintain the natural look of your brow; you must keep thickness and shape in mind.