I am not color blind, but I have had several family members ask me that exact same question " Why would you use THOSE colors together ? " At first, I was devastated, then I learned a very simple trick.
" Because I felt like it ! " and " Why Not ? " became my responses. I also stopped asking those people for their opinions on my art. If your choices look nice to YOU, do not let someone else tell you you are wrong ! Ever !
Van Gogh and Picasso are both thought to have been color blind, and you can be sure no one is complaining about their color selections !