It doesn't color the hair (not for me) but if you are worried then use the tanning mouse, its like foam and just spread it over the lace it will dry by it self within minutes.

The color does come of after washing the system so tanning spray or mouse will need another application, but belive me it works amazingly.

You will not see the lace even without the glue by just putting the lace on skin, its the perfect color match of the tanned skin and lace that makes it dissapear.