pbir-themes

name	pbir-themes
description	Use when authoring or editing a Power BI report theme JSON under Report.Report/StaticResources/SharedResources/BaseThemes/ or RegisteredResources/. Covers top-level theme properties (name, dataColors palette, semantic colors background/foreground/tableAccent, sentiment good/bad/neutral/minimum/maximum/center, textClasses title/label/callout/header, visualStyles), inheritance (wildcard, per-visualType, per-instance visual.json), state keys (default, hover, press, selected), theme JSON value conventions — BARE numbers never D/L suffixes, BARE hex without inner quotes, unlike visual.json — ThemeDataColor with ColorId + Percent tint, container vs chart object properties, textClasses, outspacePane styling (colors, text, backgrounds, input colors, width), filterCard targeting Available/Applied/GUID, wildcard + override patterns, clearing stale overrides via pbir visuals clear-formatting --keep-cf -f. Invoke when user edits a theme file, tweaks CY24SU10, or fixes a theme-not-applied issue.
paths	["**/StaticResources/**/*.json","**/BaseThemes/*.json","**/RegisteredResources/*.json"]

PBIR Theme Reference

Themes define default formatting inherited by all visuals. Review the theme BEFORE editing individual visuals.

File Locations

Theme	Path
Base (built-in)	Report.Report/StaticResources/SharedResources/BaseThemes/<Name>.json
Custom	Report.Report/StaticResources/RegisteredResources/<Name>.json

Both referenced in report.json:

"themeCollection": {
  "baseTheme": {"name": "CY24SU10", "type": "SharedResources"},
  "customTheme": {"name": "MyTheme.json", "type": "RegisteredResources"}
}

Base Themes (April 2026)

Custom themes layer on top of a base theme. Three are shipped:

Base theme	Status	Notes
Fluent 2	Preview (Desktop only)	Modern Fluent 2 styling. New pages default to 1920x1080 (initial page stays 1280x720). Adds chart / button / slicer / small-multiples style presets. Enable via Options › Preview features › "Modern visual defaults and customize theme improvements".
Classic 2026	Default for new reports	Incremental refresh of CY24SU10-era defaults.
Classic 2018	Legacy compatibility	Original base theme; reports created before 2026.

Switch via View › Themes › Customize current theme › Base theme dropdown. The Customize-theme dialog also surfaces aspect-ratio page-size presets and table/matrix style enhancements when the preview is on.

The published theme JSON schema referenced by visualStyles tracks the latest base — current is reportThemeSchema-2.149.json (under microsoft/powerbi-desktop-samples on GitHub).

Top-Level Theme Properties

Property	Type	Notes
name	string	Theme name
dataColors	string[]	Palette hex strings, 0-indexed (referenced by ColorId)
background / foreground / tableAccent	string	Semantic colors
good / bad / neutral / minimum / maximum / center	string	Sentiment colors
textClasses	object	title, label, callout, header → fontSize, fontFace, color
visualStyles	object	[visualType][state] formatting overrides

Inheritance Hierarchy (broad → specific)

1. Wildcard visualStyles["*"]["*"] — all visuals
2. Visual type visualStyles["lineChart"]["*"] — overrides wildcard for that type
3. Visual instance — objects / visualContainerObjects in visual.json (see pbir-visual-json for the objects vs visualContainerObjects split in schema 2.4.0+)

visualStyles Structure

Two-level keys: [visualType][state]. Second level is a state, not an instance selector.

State	Meaning
"*"	Default (normal rendering) — most common
"hover"	Hover state
"press"	Press/click state
"selected"	Selected state

"visualStyles": {
  "slicer": {
    "*":     {"items": [{"fontColor": {"solid": {"color": "#000000"}}}]},
    "hover": {"items": [{"fontColor": {"solid": {"color": "#118DFF"}}}]}
  }
}

Theme JSON Value Conventions

Type	Theme JSON	visual.json
Integer	14	{"expr": {"Literal": {"Value": "14L"}}}
Float	14.5	"14.5D"
Boolean	true	"true"
Hex color	"#e03131" (bare)	"'#e03131'" (inner quotes)
ThemeDataColor	{"solid": {"color": {"ThemeDataColor": {"ColorId": 0, "Percent": 0}}}}	Same shape wrapped in expr

Never use D / L suffixes in theme JSON — bare numbers only.

ThemeDataColor

{"solid": {"color": {"ThemeDataColor": {"ColorId": 5, "Percent": 0.4}}}}

Property	Notes
ColorId	0-based index into dataColors[]
Percent	0 = exact, 0.1..1.0 = lighter, -1.0..-0.1 = darker

Container Properties (visualContainerObjects)

Place under visualStyles["*"]["*"] or per visual type. Arrays of property objects.

Object	Keys
title	show, fontSize, fontFamily, fontColor, alignment
subTitle	show, fontSize, fontFamily, fontColor
background	show, color, transparency
border	show, width, color, radius
dropShadow	show, angle, distance, blur, color
padding	top, bottom, left, right
divider	show, color, style, width
visualHeader	show
visualTooltip	type, titleFontColor

Visual Object Properties (objects)

Chart-specific formatting keys placed under visualStyles["*"]["*"] or per visual type: categoryAxis, valueAxis, labels, legend, dataPoint, plotArea, lineStyles, markers.

textClasses

"textClasses": {
  "title":   {"fontSize": 14, "fontFace": "Segoe UI Semibold"},
  "header":  {"fontSize": 12, "fontFace": "Segoe UI Semibold"},
  "label":   {"fontSize": 11, "fontFace": "Segoe UI"},
  "callout": {"fontSize": 45, "fontFace": "DIN"}
}

CY24SU10 defaults: callout 45 DIN, title 12 DIN, header 12 Segoe UI Semibold, label 10 Segoe UI. All #252423.

Filter Pane Styling — outspacePane (owned here)

Location: visualStyles["*"]["*"].outspacePane. Theme owns every styling property of the filter pane. Visibility / expansion state is separate — see pbir-filters for report.json → objects.outspacePane.

Property	Type	Notes
backgroundColor	color	{"solid": {"color": ...}} or ThemeDataColor
transparency	integer	0-100 (bare)
border	boolean	Show vertical separator
borderColor	color	Separator color
fontFamily	string	Triple-quoted fallback chain
foregroundColor	color	Text, icons, buttons
titleSize	integer	Points
headerSize	integer	Points
searchTextSize	integer	Points
inputBoxColor	color	Input field background
checkboxAndApplyColor	color	Apply button, checkboxes
width	integer	Pixels

Filter Card Styling — filterCard

Location: visualStyles["*"]["*"].filterCard (array). Target specific card states via $id.

$id	Targets
"Available"	Unapplied filters (filter pane list)
"Applied"	Actively applied filters
"<GUID>"	Specific filter by its name from filterConfig

Property	Type
backgroundColor	color
transparency	integer 0-100
border	boolean
borderColor	color
fontFamily	string
foregroundColor	color
textSize	integer
inputBoxColor	color

Note: filterCard without $id can also live at visualStyles["page"]["*"].filterCard as a base fallback.

Wildcard + Override Pattern

{
  "visualStyles": {
    "*": {
      "*": {
        "title": [{"show": true, "fontSize": 12}]
      }
    },
    "textbox": {
      "*": {
        "title":      [{"show": false}],
        "background": [{"show": false}],
        "border":     [{"show": false}],
        "dropShadow": [{"show": false}]
      }
    }
  }
}

pbir CLI

pbir theme colors "Report.Report"                    # list palette
pbir theme set-formatting "Report.Report" ...        # set properties
pbir visuals clear-formatting "Report.Report/**/*.Visual" --keep-cf -f

Without CLI use jq with temp-file pattern:

THEME=$(jq -r '.themeCollection.customTheme.name' Report.Report/definition/report.json)
THEME="Report.Report/StaticResources/RegisteredResources/$THEME"
jq '.visualStyles["*"]["*"].title[0].fontSize = 14' "$THEME" > "$THEME.tmp" && mv "$THEME.tmp" "$THEME"
jq empty "$THEME"

Clearing Visual-Level Overrides (Enforce Theme)

Stale objects / visualContainerObjects in visual.json override theme defaults.

• Clear container only (safe, preserves CF): jq 'del(.visualContainerObjects)' visual.json
• Clear all bespoke formatting (removes CF too): jq 'del(.objects) | del(.visualContainerObjects)' visual.json

Gotchas

Issue	Cause	Fix
D/L suffix rejected in theme	Used visual.json literal shape	Theme JSON uses bare numbers
Hex color rendered as literal text	Inner single quotes "'#fff'" in theme	Theme uses bare "#ffffff"
id key ignored in filterCard	Used "id"	Theme uses "$id"
Filter pane styling causes deploy error	Styling placed in report.json outspacePane	Only visible/expanded allowed in report.json — move styling to theme
Theme changes invisible after apply	Stale visualContainerObjects in visuals	Run pbir visuals clear-formatting --keep-cf -f
ColorId out of range	Palette has fewer entries than referenced	Check dataColors[] length
Font fallback chain broken	Not triple-quoted	"'Segoe UI Semibold', wf_segoe-ui_semibold, helvetica, arial, sans-serif"
Inheritance not applying	Put properties at wrong state key	Default state is "*", not "default"
Third-level "*" catch-all confusing	Real themes sometimes nest another "*" for generic props	Treat as fallback; normal paths still work
textClasses not inheriting	Used fontSize as string	Must be bare integer

Reference

• Microsoft Learn: Use report themes in Power BI Desktop
• Microsoft Learn: Create custom report themes (full JSON reference)
• Microsoft Learn: Set formatted text defaults (textClasses table)