Consistent color mapping across visuals in Power BI reports

The standard solution for this is a color mapping table + DAX conditional formatting measure, and it scales well across large reports.
Step 1 — Create a color mapping table (either in Power Query or as a calculated table):
CategoryHexColorProduct A#4472C4Product B#ED7D31Product C#A9D18E
Step 2 — Create a DAX measure that looks up the color for the current context:
daxCategory Color =
LOOKUPVALUE(
ColorMapping[HexColor],
ColorMapping[Category],
SELECTEDVALUE('Products'[Category]),
"#BFBFBF" -- default fallback color
)
Step 3 — Apply to each visual via Format → Data colors → fx (conditional formatting) → Field value → select your Category Color measure.
Yes, you still have to wire it up per visual — there's no true global binding in Power BI today — but you only define the colors once in the mapping table. When you need to change Product A's color, you update one row and it flows everywhere automatically.
For cross-report consistency, the cleanest approach is to put the color mapping table in a shared semantic model that all reports connect to. Then every report uses the same source of truth.
Bonus tip: You can also embed the color mappings directly in the report theme JSON under dataColors with named entries, but that approach only works reliably for series order, not specific category-to-color bindings. The DAX measure method is more robust for named categories.

1) Create a color mapping table

Create a small table that defines the color for each category.

2) Create a color measure

Return the color based on the current category.

Product Color =
SELECTEDVALUE ( ProductColorMap[Color] )

3) Apply conditional formatting

In each visual:

Format → Data colors → Conditional formatting → Format by: Field value

Select the Product Color measure.