How do you use the slice function with color?

I have a 3x3x3 matrix and I want it to correspond to the color of each square, yet rather than producing a 3x3x3 cube, a 2x2x2 cube is generated. Here is my code:

colormap jet

xslice = 10; yslice = 10; zslice = [0.1 1 10];

slice([0.1 1 10], [0.1 1 10], [0.1 1 10], my_map(:,:,:,1), xslice, yslice, zslice);

ax = gca; ax.XScale = 'log'; ax.YScale = 'log'; ax.ZScale = 'log';

colorbar;