Line chart - multiple lines with gradient

[M0X3]

Hi! I'm looking to create a chart with multiple lines, each one representing a different day's worth of data. As I add more lines, I want the newer data to be shown in a different color as the older one, forming a gradient among the lines that makes it clear which data is more recent. This could either be a color gradient or a gradient that makes the older lines fade out and become less opaque. I'd really appreciate any help! Thank you