Cube Vertices: Two Opposite-Colour Neighbours Each

Problem

Colour all 8 vertices of a cube red and blue so that from each red vertex one can travel along an edge to exactly two blue vertices, and from each blue vertex to exactly two red vertices.

Cube Vertices Colouring

red

blue

Click a vertex to cycle through colours. Drag the cube to rotate.

Element 0 (LBF): expected 2 blue neighbour(s), got 0
Element 1 (RBF): expected 2 blue neighbour(s), got 0
Element 2 (LTF): expected 2 blue neighbour(s), got 0
Element 3 (RTF): expected 2 blue neighbour(s), got 0
Element 4 (LBBk): expected 2 blue neighbour(s), got 0
Element 5 (RBBk): expected 2 blue neighbour(s), got 0
Element 6 (LTBk): expected 2 blue neighbour(s), got 0
Element 7 (RTBk): expected 2 blue neighbour(s), got 0

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