Black mold usually looks like dark greenish-black or black patches, often with an irregular shape and a slimy, wet, or sometimes fuzzy texture. It can also look like dark specks or a stain on walls, ceilings, drywall, wood, or other damp materials.

Quick Scoop

A few common visual clues are:

  • Dark green, gray-black, or brownish discoloration.
  • Patchy or speckled growth with uneven edges rather than a neat circle.
  • A slimy, slick look when wet, or a dusty/powdery look when dry.
  • Growth in places with moisture damage, like bathrooms, basements, around leaks, or behind walls.

Important Note

Color alone does not prove it is black mold, because many molds can look dark. Visual appearance is not enough to confirm whether it is the specific toxic type, and professional testing may be needed if you suspect a problem.

If you want, I can also give you a simple checklist for telling mold, dirt, and mildew apart.