Can't set tickColor to white when using yaxis label on line graph

[scout208]

When I don't have the yaxis label set to display anything, I can use:

xaxis: {
  tickColor: "#ffffff"
}

to make the xaxis lines white so that they hide in the background. However, once I have set:

yaxis: {
  axisLabel: "My Label"
}

it overrides the tick color and sets it to gray. It also makes the tick lines wider.

I've only noticed this problem when I'm displaying data series as lines. My bar graph doesn't have this issue.