Foilyage is a technique of free form painting known as balayage, but with the added benefit of foils underneath. The foils underneath keep the rest of the hair away from the lightener, allowing for a higher and lighter color to be achieved.
Foilyage is used for the client with darker hair that wants a blended look and lighter blonde than balayage alone can achieve. Balayage painting technique allows the client to come in less often than traditional highlights, as it grows out without a harsh line of demarcation where the new growth and the old growth meet.
The color melts and is blended from the dark natural tones down the strand to the lighter tones. A great example is celebrities like Chrissy Tiegen or KhloeKardashian who have dark natural colored hair.
As all color techniques, a high level of skill is necessary. Do not try this at home! Booking a free consultation before this and all color services is always recommended.