Join us at FabCon Atlanta from March 16 - 20, 2026, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM.
Register now!The Power BI Data Visualization World Championships is back! It's time to submit your entry. Live now!
Does anyone have a working json file that updates the font and font size? The defaults are horrific. I've tried the theme generator and example from curbal but neither actually work.
Hi @cdknuth,
Maybe you can refer to following link which told about custom theme elements.
Custom Report Theme JSON Property settings in Tables/Matrix
Regards,
Xiaoxin Sheng
Thanks, Xiaoxin. I've tried these formats and neither work.
{
"name":"Jan 2018 Theme",
"dataColors":
[
"#0069aa",
"#4f8dc2",
"#9ab7da",
"#cedaec",
"#00c762",
"#fbe7a6",
"#ff544a",
"#f89a1c",
"#545451"
],
"background":"#FFFFFF",
"foreground":"#545451",
"tableAccent":"#4f8dc2",
"visualStyles":{
"*":{
"*": {
"*": {[ "fontFamily":"Segoe UI"]}
}
}
}
}
{
"name":"Jan 2018 Theme",
"dataColors":
[
"#0069aa",
"#4f8dc2",
"#9ab7da",
"#cedaec",
"#00c762",
"#fbe7a6",
"#ff544a",
"#f89a1c",
"#545451"
],
"background":"#FFFFFF",
"foreground":"#545451",
"tableAccent":"#4f8dc2",
"visualStyles":{
"*":{
"*": {
"*": [{ "fontFamily":"Segoe UI"}]
}
}
}
}
HI @cdknuth,
You can try to use below json formula and replace bold part with a valid font name.
{
"name":"Jan 2018 Theme",
"dataColors":[
"#0069aa",
"#4f8dc2",
"#9ab7da",
"#cedaec",
"#00c762",
"#fbe7a6",
"#ff544a",
"#f89a1c",
"#545451"
],
"background":"#FFFFFF",
"foreground":"#545451",
"tableAccent":"#4f8dc2",
"visualStyles":{
"*":{
"*":{
"*":[
{
"fontFamily":"Segoe UI"
}
]
}
}
}
}
Regards,
Xiaoxin Sheng
Thanks for the attempt, but this still doesn't work for me. Perhaps I need a newer version.
HI @cdknuth,
Maybe you can try to use below json file, I package code and confirm it works on my side.
Regards,
Xiaoxin Sheng
The Power BI Data Visualization World Championships is back! It's time to submit your entry.
Check out the January 2026 Power BI update to learn about new features.
| User | Count |
|---|---|
| 56 | |
| 42 | |
| 40 | |
| 21 | |
| 21 |
| User | Count |
|---|---|
| 149 | |
| 105 | |
| 63 | |
| 36 | |
| 36 |