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Oil Slick
Deep green, blue and violet laid over a near-black base, so color only surfaces where the light catches it.
Try Oil Slick on your own photo. Free to download, iPhone, iOS 15.1 or later.
Oil Slick


Both renders are HairGlam output. In the app the shade lands on your photo instead.
Unlike most vivid work this is built to read dark indoors: the base stays deep and the jewel tones live inside it, showing as a shift of green or violet under direct light. Because the tones themselves are dark, they take on hair lifted only a few levels rather than bleached to blonde. Fading is graceful, since as the pigment drops out it leaves a cool near-black behind instead of an obvious band.
- Undertonecool. Everything in the mix sits on the cool side, which is why it holds up next to skin with a pink, olive or blue cast rather than a strongly golden one.
- Starting pointBrown hair only needs a few levels of lift for these tones to grab, so it never has to reach blonde, though virgin black hair still needs bleach before the green and violet register.
- UpkeepGloss it back every four to six weeks as the iridescence flattens, and dark regrowth blends on its own because the base is already close to black.
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