It’s important to use a subtle color palette for all elements. The exception is the performance bar – it has to stand out. The subtleness of visual elements is important for all charts, but for bullet charts, it becomes more important because it has a lot of visual elements involved.Read more
The ranges for the qualitative scale should be chosen based on values that are considered the boundary for the given indicator. If there are no such values, a scale can be divided into generic ranges, i.e. quartiles.Read more
As the bullet chart is a complex chart including multiple elements, all of them should be properly marked.