Nine boxes, A, B, C, D, E, F, G, H and I, with different colours, red, green, blue, black, white, pink, yellow, magenta and purple, are arranged one above another in different shelves numbered 1 to 9 from bottom to top but not necessarily in the same order. The lowermost shelf is numbered as 1, the shelf above 1 is numbered as 2 and so on.

F is placed between A and G, which are blue and yellow, respectively. H is placed just below B, and its colour is black. I,  is placed between B and E, which are magenta and pink, respectively. D is is placed on shelf number 5, and its colour is white. A is placed just above the red colour box. C is placed on the top-most shelf. G is placed just above the white colour box. The green colour box is between the magenta and pink boxes.

What is the colour of C?