Dyed colored sand generally does not fade when used. Colored sand is usually dyed to ensure uniform and long-lasting color. However, the durability of colored sand will still be affected by some factors, such as friction, moisture, ultraviolet rays, etc. If the surface on which the colored sand is used is frequently wiped or exposed to water, it may cause the stained colored sand to fade gradually. Therefore, if you use colored sand outdoors or in an environment that is often exposed to water, you may need to check and replenish the colored sand regularly to keep the color bright.