Conditional formatting on the background colour of a Card

[andyor]

How can I get conditional formatting on the background colour of a Card? 

I have a column that I am using SUM on. I want the background colour to be red if the SUM is negative and green if the SUM is positive. 

The issue I see is the options they give you, you're forced to do a value >= the Min number (how can you have a minimum of a SUM?) and then you can only choose <= or < on the right options. 

Am I missing something simple?

[andyor · Accepted solution]

I don't think this is possible in the standard Power BI visuals, but I was able to download a 3rd party visual called 'Advance Card', which done the trick