MusicXML Import - Beams don't have their colour imported

[OggyP]

Issue type

Import/export

Description with steps to reproduce

1. Extract all-red.zip (unable to upload *.musicxml via github)
2. Open 'all-red.musicxml' with musescore
3. Note that all beams had the color attribute set as per https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/beam/
   e.g. <beam number="1" color="#FFFF0000">begin</beam>
4. Beams are not coloured red.

Expected Res

Supporting files, videos and screenshots

What is the latest version of MuseScore Studio where this issue is present?

OS: KDE Flatpak runtime, Arch.: x86_64, MuseScore Studio version (64-bit): 4.4.4-, revision: github-musescore-musescore-

Regression

I was unable to check

Operating system

Arch

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

[Jojo-Schmitz]

BTW: Color for flags doesn't seem to work either, as your example shows.
Nor do tuplet brackets and numbers, augmentation dots and arpeggios.

Color for flags it isn't possible currently, see w3c/musicxml#521.
Color for tuplet brackets and numbers do not get exported, not sure whether they would get imported once exported properly, but I seriously doubt it, so it's be an export and import issue
Color for augmentation dots and arpeggios do get exported, so there it is 'just' an import issue.

BTW2: Even if not relevant for the issue at hand, don't use Flatpak, it is not supported and known to be quite buggy, use the official AppImage.

[Jojo-Schmitz]

See #26495

[Jojo-Schmitz]

Added arpeggio color import