Blonde hair color for dark skin is not one decision but three: how light the blonde is, how warm or cool it reads, and how your hair gets there. Most disappointing blonde results on deep skin come from the first one. A level 10 platinum on a face with strong depth reads as a mask, while a level 7 or 8 honey sitting a few shades above your skin looks like it grew there. This page goes shade by shade, matches each to a deep skin undertone, and covers the practical side: lifting dark hair, protecting coils and relaxed hair, and the no-bleach routes with wigs, frontals and braids.
Blonde is a pigment problem before it is a style problem. Dark hair lifts through red, then orange, then yellow before it reaches anything you would call blonde. On a level 2 or 3 natural, the stage after bleach is typically a coppery orange at level 6 or 7. Fair-skinned clients can sometimes leave hair at that stage and call it strawberry. On deep skin it usually reads as brassy, because the orange sits right on top of the red and gold already in your skin and leaves no contrast. Toner is what turns that stage into honey or ash, and it is why a good blonde on deep skin is always a lift plus a tone, never just a lift.
Undertone decides how forgiving each blonde is. Deep skin with a golden or red undertone, the kind that looks warm in daylight and flushes bronze in summer, absorbs honey, caramel and gold without effort because the hair and skin are pulling the same direction. Deep skin with a blue or neutral undertone, where silver jewelry looks cleaner than gold and the skin has a plum or espresso cast, tends to look sharper in beige, champagne and ash. Neither group is locked out of anything. Warm undertones can wear ash if it is a soft ash with some beige in it, and cool undertones can wear honey if the gold is muted rather than sunny.
Contrast is the other lever, and it is the one most guides skip. Blonde against deep skin is already high contrast. If your brows, lashes and roots stay dark, the face stays anchored and even platinum looks intentional. If the brows are black, the lashes are black and the hair goes from root to tip in one flat pale tone, the hair floats off the face. Colorists often leave a 1 to 2 inch shadow root or add dark ribbons through the underlayer for this reason, so real blonde does not read as a wig.