Line Graph Background Change Based on Selections

[#1]

Hello,

I have a line graph that tracks sales over time.  What I want to do is make the background color change (shade it in) when I select a desired selection.  We will always see a set number of weeks but if I were to select 'Current month' the most recent 4 weeks background color will change and then the prior 4 weeks background color will change and be different.

The attachment gives a rough idea of the desired effect.

What is the best way to achieve this type of functionality?

Thank You.

[#2]

Hi Conor Cliffe

See attached qv sample. Look for the background color in the expression to get a better understanding. You can add multiple if conditions depending on your requirement.

The chart colour changes depending on the selection made in the field 'Alpha'

Regards

Kush.