Tuttle advises to ask your colorist for "hand-painted caramel highlights paired with a warm or dark chocolate base." And like balayage, it grows out seamlessly, since the roots are not necessarily dyed.
She booked a color partial highlight & a haircut. Base Highlight flash w/ 20 vol Toner w/ a lil splash of clear for extra shine. For her cut I started with an exaggerated Aline then I razored throughout he entire cut to soften & deconstruct it a bit.