Sidebar Color

Before update, there is so color under the title of the sidebar…
After update, there is no color under the title of the sidebar.
How can I add color under the title of the sidebar?
Sorry for poor presentation.
There is the picture that the feather I am asking:
Before update: https://”>https://jkworld.cu.cc/wp-content/uploads/02.jpg
After update: https://jkworld.cu.cc/wp-content/uploads/01.jpg