Which color is predominantly used in Duolingo's brand identity, chosen specifically because research showed it creates feelings of optimism and approachability across multiple language markets?

In the field of linguistics and marketing, color psychology plays a crucial role in how brands communicate across different languages and cultures. Various brands have conducted extensive research on how their color choices impact consumer perception and language associations. This trivia tests your knowledge of how major language-learning platforms have utilized color psychology in their brand identity to create specific emotional and linguistic connections with users.

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Bright Green (#58CC02)
Cobalt Blue (#1CB0F6)
Vibrant Orange (#FF9600)
Deep Purple (#8459FF)