I enjoy using Newsbeuter RSS reader, so I quickly generated simple theme using my favorite colors.
I will share it with you and strongly encourage to create your own theme as the whole process is quite fun and satisfying.
Store the following configuration using .newsbeuter/config configuration file.
# colors color background color255 color0 color listnormal color255 color0 color listfocus color255 color88 bold color listnormal_unread color255 color0 bold color listfocus_unread color255 color88 bold color info color255 color31 color article color255 color0 # highlights highlight article "^(Feed|Title|Link|Date|Author):.*$" color31 color0 highlight article "https?://[^ ]+" color9 color0 protect
Enjoy the blue color in user interface.