Hello friends. I am new to this forum, and this is my first post also. I am not sure this is the perfect place or not to post this. But I hope I will get a better suggestion from you. I have a problem with my Chrome. My Chrome browser’s search bar turned black from white. I don’t know why this is happening and how to fix this issue. Can anyone provide any suggestions in this regard?
You can make it white from black. Open google app go to three dots (…more) than click on customise widget. you can change the color.
Also it could be due to your Windows 10 colour setting (Settings>Colors>Default App Mode) which may be set to dark. Changed it to light and it should correct the problem.
Google is your friend (so they say). You can find many answers to problems if you use the search facility. 
Thanks for replying and the suggestions also. You are right. After that I did a Google search and found this solution. The issue is fixed after removing the Chrome theme.