A dark eyeshadow looks good on the lid, but a few particles have landed beneath the eye. Rubbing immediately can spread the pigment into a larger stain, particularly when the base is still tacky.
Pause and inspect what has fallen. Loose dry powder and a smudged cream product need different handling. Keep products and tools away from the eye itself, and stop if there is irritation.
Use a light first response
With a clean suitable brush, gently lift or sweep away loose particles without pressing them into the skin. Test a small area first. If pigment is already embedded, a controlled local cleanup may work better than repeated dry brushing.
Use a remover appropriate for the product and the eye area according to its instructions. Work carefully beneath the eye rather than dragging the skin. Reapply only the part of the base that needs repair.
Change the sequence next time
For a powder that consistently sheds, try doing the eye makeup before the under-eye base. That leaves cleanup earlier in the routine. You can also load less product at once and build the intensity gradually.
Check the brush and formula together. A dense layer picked up in one pass may behave differently from several light applications. Keep your test limited so you can tell which change helped.
Do not use household adhesive tape or an unsuitable cleaning product to pull pigment from delicate skin. A quick-looking online trick may introduce irritation or disturb more makeup than it removes.
Note the combination that works for the shadow you actually own: order of application, brush and amount. A small adjustment in the routine is often more useful than repeatedly rebuilding the entire face after the same avoidable spill of powder.