Then we cross the spring-green vine arches,
Puis nous traversons les arches de vigne d'un vert printanier,
Does the green not refer to the arches (Plural)?
Margaret, the phrase is ‘d’un vert printanier’, in the singular. Vert is a noun (masculine) in this expression, modified by the adjective printanier. If it was simply “les arches vertes “, agreement would be required (feminine, plural).
Also for information, adjectival compound colour names with a noun modifier would be invariable.
(It helps if you can include a direct link to the exercise or specific example with questions, as often context is important)
Compound colour names and colour names derived from things are invariable (French Colour Adjectives)
Sign in to submit your answer
Don't have an account yet? Join today
Test your French to the CEFR standard