Highlight and contouring for darker skintones tends to be a bit tricky compared to lighter skintones.
Casting light and shadow perfectly (essentially what highlighting and contouring does) on the face requires practice to nail it perfectly over time.
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For instance, when choosing highlight and contour shades don't use shades that are noticeably lighter or darker than your natural skin tone in which case it comes off looking funny.
Learn how to get a flawless highlight and contour for dark skin tones in the tutorial above.