The color of the sky on other planets can vary depending on a number of factors such as the composition of the planet's atmosphere, the presence of clouds and other atmospheric conditions. For example, on Mars, the sky appears to be reddish due to the presence of iron oxide dust in the atmosphere. On Venus, the thick atmosphere causes the sky to appear yellowish-white. On Saturn's largest moon, Titan, the sky is a hazy orange color due to a thick nitrogen and methane atmosphere.

So in short, the color of the sky on other planets is not always blue and can vary depending on the planet's specific atmospheric conditions.
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