OK thank you
Please try to reproduce the example of phenol dimer by exactly following video tutorial (https://youtu.be/e4FpVc9ao48). If all colors are still white, perhaps your VMD is problematic. Please use VMD 1.9.3 if you are using other version. If VMD 1.9.3 also doesn't work, please try to upgrade your GPU driver or try to plot on another machine.
Dear Prof.
During NCI-RDG analysis if I use phenol.wfn file instead of phenol dimer the outcome isosurface is showing white instead of colour. I tried to colour it but was unable to do so, please tell me how to make it colour. The image has been attached below.