Exception ( Color) with formula variable

Hi Everyone,

I am creating a report in which i am using 2 key-figures ( attribute of master data ). using it through formula variable replacement path. Now i want to create an exception in which i am giving

if Stock            Bad 1 ( Red Color )                       between ( formula variable 1 and formula variable 2 )  

But when i am executing query it is not giving me color. When i am replacing formula variable with a constant value color is shown to report.

In Report formula variable value is showing.

Thanks...