This makes the sea water blue. This is often the result of characteristics of the water. Why Is The Sky Blue And Sea Blue For More Geography Stuff For Kids Visit Http Mocomi Com Lear Geography For Kids Educational Videos Kids Learning Videos But the sea is not always blue. . You may have noticed that sometimes water can also appear to be colours other than blue. As water molecules are better at absorbing light with longer wavelengths they absorb much of the red orange yellow and. Chris Doering explains why he picked Kentucky to go 11-1 - A Sea Of Blue SB Nation. The sea appears blue because water absorbs more red and yellow light than blue light. According to Rayleigh criteria light having a shorter wavelength will scatter more. The strongest inhibitor of these UV penetrations is the color blue which is why the most common lake dyes used are blue. The answer lies in the depth. The deeper the basin the dark