Green Square
This is a square, and each platform is displayed in green. This emoji can be used to represent many green things, usually as a sign of safety and normal operation; Sometimes, it can also be used on the K-line chart in stock market software.
Different platforms depict different square patterns. The squares depicted on most platforms have four right angles, but in the emojis on Twitter and Facebook platforms, the four corners of the squares have certain radians and look relatively smooth. In addition, the squares depicted by WhatsApp and Emojipedia platforms are gradually changing color, and the colors gradually darken from top to bottom. Microsoft and OpenMoji platforms, on the other hand, draw black edges around the square, which makes them look more conspicuous.