Water appears to have no color because it is transparent to visible light. This means that visible light can pass through water without being absorbed, reflected, or refracted, and as a result, we can see through it. When light enters the water, it travels through the water molecules, which are evenly distributed throughout the liquid. Because water molecules are relatively small and simple, they do not absorb or reflect visible light in the same way that more complex molecules, such as those found in pigments, do.
While water is generally considered to be colorless, it can appear to have a color under certain conditions. For example, water can appear blue when viewed in large quantities, such as a lake or ocean. This blue color is due to the absorption and scattering of light by the water molecules and suspended particles in the water. Additionally, water can also appear to have a color when it contains dissolved substances, such as minerals or organic matter. In these cases, the color of the dissolved substances can be seen in the water.
In summary, water has no color because it is transparent to visible light, which means that light can pass through it without being absorbed, reflected, or refracted. However, water can appear to have a color under certain conditions, such as when viewed in large quantities or when it contains dissolved substances.