The image shows a diagram of three cubes labeled 7, 8, and 9. Each cube is depicted with a network of lines forming its edges, and the faces are colored. The cubes are meant to represent a tesseract, a four-dimensional hypercube. The color scheme is complex, with each face of the cube being a different color. The colors used include red, white, blue, purple, pink, orange, green, brown, ochre, and light yellow. The colors are arranged in a way that opposite faces of the cube have the same color. Each cube is labeled with the numbers 7, 8, and 9, and there are labels indicating the 'interior' color of the cube. There are also labels with the letters 'n' and 'y' on some of the edges, likely representing axes in space. Below the cubes is a caption that reads: 'The tesseract, with red, white, blue axes in space. Opposite faces are coloured identically.'