Winckelmans have christened this 'white' but it's what most would describe as off-white.  It has a very slightly warm/grey tint.  The brightest Winckelmans white is E15.  If you’re looking for the whitest of all ceramic whites, go for Cinca E201 (but remember it’s slightly larger than these Winckelmans tiles). Individual tiles measure ±20 x 20 x 3.5mm. They are usually smooth on the top side and have a series of small indentations on the under side. They come face-mounted on paper sheets which measure 305 x 305mm. There are 196 tiles per sheet and 49 tiles per part sheet. Very occasionally the tiles come mounted on mesh if paper-faced ones are unavailable, in which case they can be peeled off the backing by hand. Paper-mounted tiles should be soaked in warm water for 5 to 10 minutes, then removed and left to air dry or rubbed dry with an old towel. Winckelmans tiles cut beautifully with tile nippers or with our new wheeled porcelain cutters. They are extremely versatile and can be used on vertical or horizontal surfaces both indoors and out. They are super-tough, being both frost- and UV-resistant. If you are using outside, you must use in small quantities or mixed with other materials so that your floor has sufficient slip resistance.

If you're trying to match a colour, you may find it useful to know codes/names under which this tile has previously been sold by Mosaic Workshop and other retailers:

WK121

Off-white

Off white

BAU

E13

Use the button at the top right of the home page to search for any numbers/names you're trying to match