Color cubes with e.g. a linear function?

Questions
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1

Dear Community,

I’ve constructed a few cubes with indices from 1 to 9. (see Cubes.nb) I would like to color them with e.g. a linear function. Cube 1 should be e.g. blue, cube 9 e.g. red, and the remaining cubes should change color linearly between blue and red. How could I do it? I guess it has something to do with the ColorFunction but its not clear how to use it.

Tx for the help in advance, best regards
Andras

Cubes.nb (6.47 KB)

2

something like this

cubes[[ic]]     = {Hue[(3i+j)/10],Cuboid[ {i-0.5,j-0.5,1} , {i+0.5,j+0.5,2} ]} ;
3

Dear Frank,

Perfect, thank you very much :-).

Andras