When defining a result, it is necessary to make sure that you have made selections that are supported by the application. Normally, the application generates a message indicating that the result type is not available but there are instances when result information is not provided, that is, the application will not display contour information or it will display generically colored contour information.
Note that:
Result objects must be scoped to geometry that supports the elements and nodes used by the body; failing to do so will cause Mechanical to display result contours in grayscale. For example, stress results do not exist on gasket elements. Therefore, if you scope a stress result to a gasket body, the result displays in grayscale.
All possible result data is not provided by a result file. If you create an expression in a user-defined result that is not applicable to the analysis, such as Total Deformation during in a thermal analysis, then the result display will have no contour colors.
The solver can create elements such as surface effect as well as interface elements. Results cannot be scoped to these elements. For example, because of software limitations, contour colors for surface effect results will not be shown, even though the surface effect elements cover meshed elements on the body.