Why cleaning sponges are yellow

Most cleaning sponges are yellow because manufacturers dye them this color to mask dirt and discoloration, keeping them looking clean. This practice also aligns with color psychology, associating yellow with optimism and energy, and its brightness makes sponges easily visible in water or dark areas. Colored sponges, such as green or red, are often used to differentiate them for specific cleaning tasks or to indicate their varying levels of firmness.