While the rest of the universe was still evolving, the Gallifreyans were highly advanced in science, medicine and all other aspects. Gallifrey's appearance from space is a giant planet with a golden yellow colour. Susan described Gallifrey as having bright silver lined leaves on the trees, with a burnt orange sky. Everything outside the city has an amber tint. Whether the colour of the sky has anything to do with an Amber Alert that was used in The Invasion of Time is unknown. Fields of deep red grass were covered in snow. Rocks were not simply grey colours, but red and orange and gold. Gallifrey was called the Shining World of the Seven Systems. Gallifrey was truely a beautiful planet, but the history of the planet, isnt so pretty.