Vermicelli is one of the oldest devices in wallpaper: a ground covered in fine wandering lines, named for what it resembles, used since the eighteenth century to give a wall texture without pattern. Coral is that design reduced in scale, redrawn small enough to be produced by a modern printing process rather than from blocks.
Shrinking it changed what it does. At the original block-printed size the meander is legible as a motif; at this scale it dissolves, and the wall reads as an evenly textured surface with a faint organic movement running through it. It is one of the most useful things a paper can be: not a plain, because plains go dead in daylight, and not a pattern either.
The range is deliberately wide, covering the house's long-established colours as well as a full run of neutrals, which means it can usually be matched to whatever else a room contains rather than the other way about. It is the paper for rooms that have to work hard and not be noticed: halls, landings, back stairs, bedrooms, and the walls behind a room full of pictures. It is the paper you specify when nothing about the wall should be noticed.