Background of Calendar Item - SharePoint Calendar on Teams Tab

Hi,

I converted a classic SharePoint calendar to use a modern calendar view as the default view (https://www.mrsharepoint.guru/how-to-migrate-classic-events-list-calendar-to-modern/#:~:text=To%20view%20the%20list%20in%20the%20modern%20experience%2C,see%20the%20list%20transform%20into%20a%20modern%20one.) and then added it as a tab on Teams. The calendar itself is displayed as expected except for the background of the items. The background color is different from a regular Teams calendar and the contrast between the background and text color is bad. I tried to change the color using view formatting for the day but that is not working. Is this a bug on Teams or do I need to adjust something in SharePoint?