Engineering is a popular and specialised industry. Electronics engineers design, develop and test components, devices, systems or equipment that use electricity as part of their source of power. These components include capacitors, diodes, resistors and transistors.
Mercury: grey. Venus: yellowish-white. Earth: light blue with white clouds; oceans and light scattered by the atmosphere make Earth prevailingly blue. Mars: red-orange. Jupiter: has orange and white bands; the white bands are colored by ammonia clouds, while the orange comes from ammonium hydrosulfide clouds. Saturn: pale yellow; ammonia haze covers the whole planet and obscures redder clouds below. Uranus: light blue; the color comes from methane clouds.
Here are the true colors of the planets, with links to some relevant images from NASA spacecraft. Mercury: gray (or slightly brownish). Mercury has practically no atmosphere, so we just see the rocky surface. Note that many images of Mercury (like this one) are grayscale, derived from a single color filter.