Change Backround of apps like krita, inkspace and eclipse IDE

Can someone guide me to change background color and themes of the above mentioned apps.
I want the default white background and default icons in apps

Did you try your desktop environment's Appearance or Theme settings? That's generally how you change themes.


i tried, but nothing works!
It looks like eclipse is mess in linux as I saw some common problems like mine with other distros too!

Without more information from you about what you are running, what you have tried, etc., this isn't solvable.

However, I'll link this here as it's likely the issue you're having: