how to set apex heatmap border?

Question

I am referring to the apexcharts documentation to find if there is anyway to show the border of each cell in the heatmap.

So far, I have tried to add

grid: {
  show: true,
  borderColor: '#90A4AE',
}

which did not work.

fyi, this is the current state of the heatmap.

Any suggestion will be helpful, thank you!

Answer 1

You can change stroke color (white space between cells) like this

stroke: {
  colors: ["#90A4AE"],
},

https://apexcharts.com/docs/options/stroke/