To improve the readability of the title text in inactive windows, you can customize the colors through the Windows settings, but it seems you have already tried modifying the registry keys without success. The inactive title text color is typically determined by the system settings and may not be directly adjustable through the registry entries you mentioned.
For Windows 10, you can try the following approaches:
- High Contrast Mode: Enabling high contrast mode can significantly improve the visibility of text and UI elements. You can find this option in the Settings under Ease of Access > High Contrast.
- Personalization Settings: Go to Settings > Personalization > Colors. Here, you can select your color preferences, which might help in improving the contrast for inactive windows.
- Custom Themes: Consider using third-party themes or applications that allow for more extensive customization of window colors and text. Some applications might let you set specific colors for inactive title bars and text.
Unfortunately, if these options do not provide the desired effect, the customization of inactive title text color may be limited by the system's design, and further customization might not be possible without third-party tools.
References: