the green color is the nature color, The green colors always giving relaxation to eyes. Actually tt calms our nerves system and makes us feel mentally comfortable. Green is one of the most eminent colors on the Earth. Green color not only symbolizes nature but also represent the natural world around us. You can see trees are green, so are the foliage and plants. The colors that symbolize the planet Earth are green, brown and blue. as a result, when you go out in space, you will see these three colors.