Minecraft wiki entry for Warped_Forest, associated text: When the Warped forest was announced at MINECON Live 2019, which happened before the first Nether Update snapshot was released, it was known as "Blue Nether wart forest". In the announcement, however, it was called "Nether wart forest blue".
Despite the former name "Blue", the biome's actual color scheme is closer to shades of cyan-green, rather than blue.
The ambience sound "Warped Forest Addition 6" is actually the sound of an enderman screaming, slowed down, and in reverse.