Expression to color Null Values on Pie/Donut Chart

[ltc]

Hi Qlik Community,

I have a donut chart with null values.  I have renamed the null values to "Not Uploaded" via an expression, as seen in the image below.  Now I need to color the "Not Uploaded" values yellow.  I want to use the standard Qlik Sense yellow from their color scheme "12 Colors".  See below.

What is the expression for this?

My field name is "CCaR User DD2875 Is Valid"

Thanks so much!

[poojashribanger]

may be you can use

if( isnull(expn),yellow)

[poojashribanger]

change your expression in dimension like

if(isnull(dimension),'Not Uploaded',dimension)

then colour by expression

it's working fine.