How to darken the interface area where I write code in CubeIDE

JEngineerHW · ‎2026-03-04

This time, my problem is not related to hardware or firmware.

What happened was that when I closed Cube IDE during my lunch break, everything was normal... but when I came back and opened it again, the interface colors had changed, which I don't like, and personally, I find that appearance visually uncomfortable.

As you can see in the attached image, the gray color where I write code seems to have a haze over it. How can I correct it so that it looks like a solid, dark tone like the part below?

Thank you for your help. My eyes and I will greatly appreciate it.

Ghofrane GSOURI · ‎2026-03-04

Hello @JEngineerHW

Open Preferences (Window → Preferences on Windows/Linux, or STM32CubeIDE → Preferences on macOS), then go to General → Appearance. Change the Theme from Dark/STM32CubeIDE Dark to Light (or any other theme), click Apply and let the UI switch. Then, in the same Appearance page, set the theme back to Dark/STM32CubeIDE Dark, click Apply and Close, and restart STM32CubeIDE if prompted. This theme “round-trip” often clears rendering glitches and should remove the gray “haze” so the code editor returns to a solid dark background.

THX

Ghofrane

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