Line color setting with Date Markers

I would like to draw lines at peak times or the times of corresponding values ​​using the Markers in Quiver’s Time Series Chart.
However, when I draw multiple lines on the same graph, they are both the same color (black), making them difficult to see.
If possible, I would like to set the color of each line individually. Is this possible?

It is not currently possible to add a color to time series chart markers, but we will track this as a feature request!
Are all of your markers Date/time parameter cards? Or are there markers using other card types?

Thank you for your reply.
You are considering using date/time parameters.
By the way, when will this function be added?