Blue dilution refers to the phenomenon where the color of a liquid appears less intense or more diluted due to the addition of a clear or lighter substance. This can occur in various contexts, such as when mixing dyes or paints, where the original color becomes less vibrant as more of the lighter substance is introduced. In the context of oceanography, blue dilution can also describe how the color of ocean water appears lighter in areas where freshwater from rivers mixes with saltwater. This mixing can affect the overall color perception of the water, making it look less deep blue and more turquoise or greenish.