Changing colors for ping module in luci-app-statistics

I want to change the colors used for luci-app-statistics when graphing with rrdtool the ping module's output.
Any hints? I think I've tracked this down to rrdtool.js using random colors based on the plugin name, plugin instance, dtype. Unfortunately the colors for the 4th and 5th hosts are quite similar:
ab6c7b and b4718f, they are hard for me to distinguish, the bottom two in this screen capture
Screen Shot 2021-11-07 at 23.03.21

Any suggestions on how to customize these colors, or reset the PRNG or its seed somehow for collectd-mod-ping or luci-app-statistics ping module?