How many letters does the top answer for “of a purple color; purple.” have?

The most common answer is purpureal (9 letters).

Crossword clue: of a purple color; purple.

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

purpureal 9 letters web-def

Of a purple color; purple.

a pale purple color 67% similar → lavender

author of the color purple 67% similar → busia, goldberg, walker

composer of the color purple 67% similar → busia, goldberg

of a moderate purple color 67% similar → amethyst

of a pale purple color 67% similar → lilac

wrote the color purple 67% similar → busia, goldberg, walker

a vivid blue to purple-blue color 50% similar → ultramarine

of a bright red or purple color. 50% similar → puniceous, punicial