Quenya 

menelluin

noun. cornflower (colour), *(lit.) sky-blue

Part of the label for the emblem of Idril, translated “cornflower” (TAI/193), probably the flower but possibly the color. It seems to be a combination of menel “sky” and luinë “blue”.

menelluin írildeo ondolindello

Cornflower of Idril from Gondolin