How to use ng-template in angular calendar week view to show certain day hours in different color

I am using mattlewis Angular calendar to implement week view for my project. I need to show a certain time of day in week with different background color.

I could not find an input or some other way (using ng-template) to render specific cell in week view with different background color.

I want something like this where background of specific hours in week view is shown in diff color.

Need suggestions/help with this.

Thanks.

Please suggest changes through this stackblitz demo.

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