Hello,
Please Go to Woodmart >> Header Builder >> Edit header >> Edit categories and change the background.
Screenshot for Clarification: https://prnt.sc/xz04z3
And to change the browse categories text you need to install and use the loco translate plugin then choose the correct path to translate the string.
Your path will be Loco Translate >> Themes >> Woodmart.
You can also watch the video in our detailed documentation in the following link: https://www.youtube.com/watch?v=D3NsDdMzsls
Best Regards.