To display the current week’s dates with the current day highlighted in blue, start by creating a repeating group that will show each day of the week (Monday to Sunday). Set the repeating group’s type of content to “Date” and use the data source to calculate the current week’s Monday, which you can do with the expression Current Date/Time: rounded down to week + (days): 1. In the repeating group cells, increment the date by using the current cell’s index to display each day from Monday through Sunday.
Then, add a group element behind the date to act as the background for each day. To highlight the current day, go to the conditional tab for this background group, and set a condition where the group’s date matches the current date (Parent group's date" equals Current date/time"). When this condition is met, change the background colour to blue, which will highlight the current day.
Hope that helps 