Mesh technique color coding

When the Mesh defaults color mapping is selected, Abaqus/CAE uses different colors to indicate which meshing technique, if any, is currently assigned to a region. For example, if a solid region is meshable using the structured meshing technique, the region turns green when you enter the Mesh module; the green color indicates that the structured meshing technique is assigned to that region. Yellow indicates that the sweep meshing technique is applied to a region. If a region is unmeshable using the currently assigned element shape, the region turns orange when you enter the Mesh module. Regions that are pink or light tan have been assigned the free and bottom-up meshing techniques, respectively.

See Also
Determining which regions are meshable
Color coding geometry and mesh elements
Note:

You must use the Mesh Controls dialog box to assign the bottom-up meshing technique to a region. Abaqus/CAE does not automatically assign the bottom-up meshing technique and will not indicate whether a region that is assigned the bottom-up technique can also be meshed using a top-down technique. (For more information, see Assigning mesh controls.)

You can change the applicable meshing techniques by partitioning the region into smaller regions with simpler topology, by changing the element shape assigned to the region, or by using the Virtual Topology toolset.