Waybar doesn't respect gtk font hinting rules

[TheEdgeOfRage]

I have set font hinting to medium and set subpixel geometry (rgba) to none in ~/.gtkrc-2.0 and .config/gtk-*.0/settings.ini. Here's the specific config section from the gtk3 ini:

gtk-xft-antialias=1
gtk-xft-dpi=98304
gtk-xft-hinting=1
gtk-xft-hintstyle=hintmedium
gtk-xft-rgba=none

However, waybar still renders with rgb hinting, while ghostty and other gtk apps do not. My screen has a weird WBGR (white+rgb) subpixel geometry, so the colored subpixel rending looks horrible with red colour fringing. I'm running Archlinux and Hyprland.

Here's some magnified screenshots showing the same text with the same font and (background) color:

Waybar text:

Ghostty text: