More demography quizzes on the way! And also, before anyone takes offense, the countries turning white when guessed correctly is only a coincidence in order to contrast the grey background :)
Latin America was, for the most part, a bit iffy when I was including statistics. In most Latin American countries, white and mestizo are a single demographic, so instead I looked only at the percentage of the population who identified as "European". This could exclude people from the Middle East and mixed race people who lean more towards being white, but honestly race is such a grey area that my data cannot bee 100% correct no matter how hard I try. Long story short, Mexico might be included here, likely not though. If I missed any countries it would be Colombia or Guatemala.
Added Mexico. For some reason, the data used on Wikipedia is from 1922, and apparently both the white and black population was greatly understated. The quiz should be more accurate now.