Hii @arunchahar
Please navigate to the folder structure mentioned below and make the changes as specified.
packages -> Webkul -> Shop -> tailwind.config.js
Inside the file, you will find the colors object key, which contains the base colors for all default buttons in the Velocity theme.
You can update the defined color codes as per your requirements.
After that, open the integrated terminal from the Shop package if you have made changes to the Velocity theme. Then run the command below to publish the new changes to the shop front.
npm i
npm rtun build
If you encounter any issues while following the steps, feel free to ask here.
Thanks!