Thanks for your help! Unfortunately I don't have this option (even after enabling the plugin and restarting).
However, I found this bug report https://youtrack.jetbrains.com/issue/WI-75527/DQL-Query-Builder-support-Add-its-own-color-scheme-configuration and as I'm using a custom theme (that I've been dragging along for 10 years), tried their solution of changing the parent theme manually, and this definitely helped.
I still can't configure it, but it looks much more readable now.
@phphil Glad you can get around it for now, at least...
Maybe it's possible to manually add the config? i'm in Windows, so i go to
%APPDATA%\JetBrains\PhpStormXXXX.X\colors
i see two ICLS files, one is for my custom scheme.
It's XML-ish, and there's an <attributes> section.
Maybe tinker with that? i'm not sure why you don't see the DQL Builder options if your Storm & plugin are current. Best of luck!