With advances in discrete differential geometry, it is now nearly routine to compute curvature on meshed surfaces. Here are two of many possible color-coded examples.
Rusinkiewicz, Szymon. "Estimating curvatures and their derivatives on triangle meshes." In Proceedings. 2nd International Symposium on 3D Data Processing, Visualization and Transmission, 2004. 3DPVT 2004., pp. 486-493. IEEE, 2004. Fig. 4 (detail). DOI.
Gatzke, Timothy, Cindy Grimm, Michael Garland, and Steve Zelinka. "Curvature maps for local shape comparison." In International Conference on Shape Modeling and Applications 2005 (SMI'05), pp. 244-253. IEEE, 2005. DOI.