Geo, I'll assume the "earlier" color you refer to is Powder Blue, as on TR3 and TR4? That is a much "whiter" blue, while Wedgwood is much "greyer." It's quite obvious when they are side-by-side! (I know; I've a project Herald with a Powder Blue bonnet and a [temporarily, at least] Wedgwood Blue driver's side door...all on an otherwise near-original Pale [Primrose] Yellow repaint!)