The requirement is to maintain consistent colors for the same dimension values across two different charts. The standard and most efficient way to achieve this in Qlik Sense is by using the built-in coloring properties. Setting the coloring to 'By Dimension' instructs the chart to assign a unique color to each value of the dimension. Enabling the 'Persistent colors' option ensures that this color-to-value mapping is stored and applied consistently across all other charts within the same application that use the same dimension and setting.

A. Use nested IF statements to set the colors by expression for each dimension value

This method is inefficient, not scalable, and difficult to maintain. It requires manually hard-coding a color for each dimension value, which must be updated if new values appear.

B. Define the color values in the master measures and use the color library

This is incorrect because the requirement is to color by the dimension (Customer Name), not the measure (Total Sales, Number of Orders). Master measure coloring applies to the measure itself.

D. Use the Fieldlndex function to set the colors by expression for each dimension value

While this is a more dynamic expression than nested IFs, it is more complex than the standard UI option. Furthermore, the color assignment depends on the data load order, which may not be consistent.

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1. Qlik Sense for Windows Help, "Coloring a visualization" section: This official documentation details the coloring options available in the properties panel. It explicitly states for the 'Persistent colors' checkbox: "Select to have the colors for the dimension values be persistent across all visualizations in an app." This directly supports the chosen answer as the intended method for achieving color consistency for a dimension across multiple charts. (Accessed via Qlik Sense SaaS Help, Visualizations > Customizing a visualization > Changing the appearance of a visualization > Coloring a visualization).

2. Qlik Sense for Windows Help, "Properties panel" section: Under "Appearance > Colors and legend," the documentation describes the 'Colors' setting. When set to 'Custom' and 'By dimension', it allows for the selection of 'Persistent colors', confirming this is the correct location and combination of settings to perform the required action. (Accessed via Qlik Sense SaaS Help, Visualizations > Properties panel > Appearance properties).