.ods spreadsheets are unreadable in Dark Mode

[jordandsullivan]

Describe the Bug

A clear and concise description of what the bug is.
When using Dark Mode on mobile or desktop, the background of the spreadsheet remains white, but the text is inverted to white as well, as per dark mode. So the spreadsheet is white on white, i.e. completely unreadable.

Steps to Reproduce

I am using the Android version of Collabora through the NextCloud app, reproduced the same behavior in the web version of NextCloud using DuckDuckGo as the browser, and finally reproduced the same behavior in Firefox on Desktop.

1. Set your device to Dark Mode
2. Open a .ods spreadsheet
3. Observe that the background remains white and the text is white, making it unreadable.

Expected Behavior

I expect when I use Dark Mode, the background of my spreadsheet will be dark with white text, making it readable.

Actual Behavior

The text is white on a white background, unreadable.

Screenshots

Smartphone

(Please complete the following information)

• Device: Google pixel 6
• OS: Android 16
• Browser: DuckDuckGo
• Version: 5.265.0

Desktop

(Please complete the following information)

• Device: Macbook Air M1 (2020)
• OS: MacOS Tahoe 26.2
• Browser: FireFox
• Version: 147.0