ApexCharts custom markers color

I am using apexCharts in my vue project. charts

I want the markers color change to yellow when the line exceeds the yellow line(warnning). And the markers color change to red when the line exceeds the red line(bad). otherwise the color of markers will turn green.

my code

I thought that could write a function in color to control the color. But I failed. Is there any way to custom markers color? Thanks a lot!