You can change the blue in mushclient to an easier to see color. Hold alt, press 6.

Click the box next to the blue you’re having problems seeing and change it on the gradient scale to something easier for your eyes.

I ended up using this version of the script from February 3rd of 2017. Maybe it was a fluke, or maybe it’s something in the latest version causing the problem. Hope it helps.

I keep having the same problem. I’m wondering if I should look at an older version of the script.