High-Contrast Color Scheme / Improved Text Visibility

[johtoGit]

The current color scheme lacks sufficient contrast, making text difficult to distinguish from the background (for example, the light grey text on dark grey backgrounds), making it nearly invisible in certain lighting conditions.

Please improve the color contrast ratios or provide a "High Contrast" mode to ensure all interface text is clearly visible. While a "High Contrast" mode would be helpful, I suggest implementing a simple theming system that allows users to customize key interface colors.

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[gittiedank]

This would certainly helps visibility. It's hard to see the date of the day.

[mauriceboe]

Thanks, coming in #1370