As with all hair concealers there is a leaning curve to find what works for you, I personally use this product, Here are a few suggestions.
Before first use shake at least 30 sec,
After each spray shake a few times, If not shaken you get more concentration of color which can make it to dark.
Although this is suppose to be sprayed about 3 inches away you can spray from farther away for a lighter effect
I actually use 2 colors myself I use the darker one first then I spay a lighter shade from farther away which also give it some dimensions keeping it natural
I hope this helps