The colour of HD 189733b compared to our Solar System

This plot compares the colours of Solar System planets to the colour of the hot Jupiter HD 189733b. With the exception of Mars, the colours are primarily determined by the chemistry of the planets' atmospheres. Earth's blue atmosphere plus the blue tint of the oceans dominate our world's hue. HD 189733b's deep blue colour is produced by silicate droplets, which scatter blue light in the scorching atmosphere.

Credit:
NASA/ESA and The Hubble Heritage Team (STScI/AURA)