ProjectBivariate and Multivariate Colormapping, which resolves github.com//issues/14168 is divided into a number of milestones, of which this is one (highlighted in bold).

• Classes for bivariate and multivariate colormaps
• Colorizer andColorizingArtist to replaceScalarMappable and handle the norm→color pipeline
• AMultiNorm class to handle the normalization of data for bivariate and multivariate colormaps
• Ensure theColorizer andColorizingArtist work withMultiNorm,BivarColormap andMultivarColormap
• Expose the new functionality via the top-level plotting functions:imshow(),pcolor() andpcolormesh()
• Create equivalents tofig.colorbar() forBivarColormap andMultivarColormap to work withColorizingArtist
• Select bivariate and multivariate colormaps to include in matplotlib
• Examples demonstrating the new functionality

I will work on this issue will be worked on once#30511 is completed