3D Plotting in Matplotlib for Python

[scidam]

As it could be seen from the official docs, c parameter in the scatter function could be a vector, consisting of
corresponding colors to each point.

# changes in your code
colored_inds = [10, 12, 15]  # points #10, 12 and 15 will be blue.
colors = ['r' if j not in colored_inds else 'b' for j in range(len(x))]
ax.scatter(x, y, z, c=colors, marker='o')