This is not helped by the way
GW keep changing the terminology they use!
The 'glazes' that
GW sell are inks. The 'shades' (that used to be called washes) are slightly different; utilising a different vehicle (binder) that encourages the pigment to fall into recesses as it dries. The glazes and washes give a matt or satin finish, while the inks and glazes will give a slightly glossy look.
The nearest thing
GW now sell to their old blue ink is Guilliman Glaze. However, you can still get inks from Coat d'Arms (who used to produce
GW's range of paint); these will be identical to the old inks except for the names.
Here's a link from Hasslefree, who stock Ink Wash Blue, the Coat d'Arms equivalent to
GW's blue ink.