This is an animation of our land surface temperature and the heat key right next to it. The white and blue at the beginning of the key is the coldest temperature of the land which at thew lowest can be -25. The purple and red in the middle of the key shows the cold land again at 10 degrees. The orange leading up to yellow shows the hottest parts of the land in the world at a high of 45 degrees C. The colors all over the globe show the surface temperature of the land which will tell you how hot or cold it is.