The Bible says "Gray hair is a crown of splendour; it is attained by a righteous life." Unfortunately, it doesn't always feel that way. Although you probably aren't in love with your grey hair, you may not necessarily want to dye your entire head. "Lowlights" are an option in which some of your hair is dyed slightly darker than your natural shade, allowing your real hair to be the "highlight." While some of your grey hair will show through using this method, roots are not as noticeable as the hair grows out--which means fewer trips to the salon.
Choose a colour of hair dye that's no more than two shades darker than your natural colour. Try to use your skin tone as a gauge also when choosing a colour, as too dark a colour may make you look pale and washed out.
Put a thin layer of petroleum jelly around your hairline to prevent dye from dripping "outside the lines."
Place a lengths of foil underneath random sections of your grey hair, beginning at the root, so that the entire length of your hair is resting on the foil. Apply the dye to your brush and begin covering the entire section of hair, starting from the roots and making your way down the length of the hair.
Fold the foil lengthwise in half (and possibly once more, depending on the length of your hair). Apply dye to the hair on the other foils, folding as you go.
Wait for the specified amount of time instructed by the dye's directions, and then shower. Do not shampoo your hair. Rinse your hair until the water runs clear. Use the conditioner included with the dye, according to instructions.