musescore/MuseScore

UI Goes Strangely Bright with Inverted Score in Dark Mode

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#31875 opened on Jan 23, 2026

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Description

Issue type

UI bug (incorrect info or interface appearance)

Description with steps to reproduce

Upon opening the app & selecting a score (previously having set the app to dark mode, as well as having the invert score option ticked), the whole app gets much brighter than expected—a pale purplish/reddish hue. This makes everything harder to read (including the settings) & could be considered to look bad. This issue also affects light mode, although I don't use it enough to know anything specific.

The only workaround is to open a new instance of MuseScore & closing that score. This somehow reverts the 1st instance to normal. Repeat for subsequent open windows.

Normal hex values for Main UI: #2D2D30 Score Background: #000000

Observed hex values for Main UI: #807F89 Score Background: #1D191A

Text color is normal #FFFFFF, Home/Publish pages are normal, & Preferences & other windows are also normal (I have not checked everything, though).

Supporting files, videos and screenshots

In which versions of MuseScore Studio is this issue present?

4.6.5

Regression

I was unable to check

Operating system

OS: Windows 11 Version 24H2 or later, Arch.: x86_64

Additional context

No response

Checklist

  • This report follows the guidelines for reporting bugs and issues
  • I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
  • I have attached all requested files and information to this report
  • I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible

Contributor guide

Tech stack
cpp
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
Basic understanding of C++Familiarity with Qt theming
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate the invert score feature implementation. Examine how colors are inverted in dark mode, particularly the interaction between score background and main UI colors. Look for overlapping color transformations in the theme code. Check recent commits related to theming or color inversion. Review the relevant source files under src/app/ and src/notation/.