[BUG] Colours in 1.12-r5 dark theme are too bright for disabled users

Checks

• I have read the FAQ section, searched the open issues, and still think this is a new bug.

Describe the bug you encountered:

For people with highly sensitive vision, bright colours (even on minimum brightness OLED screens) are very uncomfortable to intolerable and viewing them consumes limited cognitive resources. Common in ASD, ME/CFS. With migraine it's often painful, sometimes extremely painful.

Colours that are too bright:

• CheckBox/RadioButton, blue/green
• blue buttons, change database/Unlock/QuickUnlock views
• light blue background, top-right unlock database view
• green icon background and white icon foreground, database/edit entry views — note: the text-colour icons on the left of (edit) entry fields are fine.
• green text, (borderless) button/URL, (edit) entry/dialog/about/password generator views
• green 3-dot menu, entry view
• green underline, Unlock/QuickUnlock views
• green field border, edit entry view
• white background, settings → plugins

P.S. I love the other GUI changes, looks more polished, feels smoother. Great work, Philipp!

Describe what you expected to happen:

See colours that aren't so bright.

What version of Keepass2Android are you using?

1.12-r5

Which version of Android are you on?

Android 14, Samsung OneUI 6.1

Reproduce the issue on Android 14 using Keepass2Android 1.12-r5, then inspect the listed Unlock, QuickUnlock, database, edit-entry, settings, plugins, and password-generator views. Compare the reported blue, green, and white elements and verify that the revised colours are less bright while remaining usable across those views.