2. A cube, lying flat on a table, the following are three views obtained after rolling in different directions once from the initial state, then the front face of the cube in its initial state is $\qquad$ color, and the right face is $\qquad$ color.



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2. Solution: The red face is adjacent to the gray, blue, brown, and white faces, so we know that the red face is opposite the green face; similarly, we know that the white face is opposite the blue face, and the gray face is opposite the brown face.

In the initial state, after rolling, the top face cannot remain the top face, so the top face in the initial state cannot be gray, green, or brown. The top face in the initial state can only be red, blue, or white. From the middle view given in the problem:
After one roll, the following four states can be obtained:
One of these must be the initial state, but gray and green cannot be the top face in the initial state, so c and d cannot be the initial state. A rolls to the left to get:

Rolls to the right to get:
And the front face of b is the green face, the opposite of the green face is the red face, which cannot result in the above two states after one roll.

Therefore, the initial state is a, its front face is the red face, and the right side is the gray face.