Can you assign a color to a specific dimension's value in the theme JSON?

[Todd88]

I am looking to assign specific colors to specific values in the JSON theme.  Is this possible?

For example, if the Company Name is "Facebook" use "#235eb5", if the Company Name is "Honda" use "#dd0f31", etc. (Hex codes not correct).

The only way I have found to do this is to go into each visualizations formatting and manually set the conditional formatting.  I would like the theme to detect the values and assign the colors.

[ajaybabuinturi]

Hi @Todd88,

I would like to let you know that unfortunately Power BI themes (defined in a theme.json file) cannot dynamically assign colors to specific categorical values(Ex: Facebook, Honda and etc)

Power BI themes can only do global color palettes (data colors, backgrounds, text), specific visualization style default, global font sizes, gridlines, etc.

But there is a workaround, by using below meassure you can achieve you requirement. Then, in each visual use this measure for conditional formatting on the data color. You can reuse this measure across all visuals.

CompanyColor = 
SWITCH(
    SELECTEDVALUE('Company'[Company Name]),
    "Facebook", "#235eb5",
    "Honda", "#dd0f31",
    "Google", "#4285F4",
    "Apple", "#A2AAAD",
    "#808080"  // default color
)

Thanks,
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[Zanqueta · Accepted solution]

Hi @Todd88 ,

No, the Power BI theme JSON file does not currently support assigning colours to specific dimension values (e.g. "Facebook" = blue, "Honda" = red) automatically. Themes can define colour palettes and default formatting, but value-based conditional formatting must be configured manually or via rules inside visuals.

Current Options

1. Manual Conditional Formatting in Visuals

This is the method you're already using:

• Go to the visual
•  
• → Format → Data colours → Conditional formatting → Rules or field value.
• Assign colours based on values (e.g. Company Name).

2. Using a Colour Mapping Table

You can create a table like:

Company Name Colour Hex

Facebook	#235eb5
Honda	#dd0f31

Then use this in conditional formatting by selecting Format by field value and pointing to the hex colour column.

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