Visibility issue of title in dark mode  #225

In our App, when switching to dark mode, the color of the titles is currently a violet shade, which is not suitable for dark mode. This results in poor visibility and readability of the titles. To improve the user experience and ensure better visibility in dark mode, it is necessary to update the title color to white.

Expected Behavior:
The title color should be changed to white in dark mode, providing a high contrast against the background and ensuring clear visibility for users.

Steps to Reproduce:

Enable dark mode in the app.
Observe the titles and notice the poor visibility of the violet-colored titles.
Suggested Solution:
Update the TextStyle widget or the corresponding theme property in the Flutter app's code to set the color property of titles to white specifically for dark mode. This will ensure improved visibility and readability of titles in dark mode.

screenshot :