Hi Atul,
Thanks for reaching out!
I’m not sure we had this problem before, but if you are willing to work on it with me, then I can help you find the source of the issue.
As first I checked the code of the 2 sites. It seems that on the techpal site there is the following css code put in somewhere, which overwrites the category colors:
.events-archive.events-gridview #tribe-events-content table .type-tribe_events {
border-color: #e4e4e4;
}
This is done through The Events Calendar Customizer (Appearance > Customize > The Events Calendar). So setting made there overwrites the category colors.
I also recommend checking this thread, which might help you find the source of the issue.
Customizer conflicts with Category Colors
Let me know if this helps.
Cheers,
Andras