F major (or the key of F) is a major scale based on F, with the pitches F, G, A, B♭, C, D, and E. Its key signature has one flat. Its relative minor is D minor and its parallel minor is F minor. F major is the home key of the English horn, the basset horn, the horn in F, the trumpet in F and the bass Wagner tuba.
The three primary colors are red yellow and blue, so the only option that would work would be yellow! I hope this helps! :)
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