How to make sure only current date has a certain color on graph

[jomilla]

Hi,

I currently am making a line graph comparing a measure by hours over the last 7 days. I want only the line for the current date to be a certain color, and any of the lines for the previous days to remain gray. However, if I refresh it, it keeps the previous day as the color and creates a new color for the current day. Any way to fix this?