John is correct, of course.......... the colour to which I was referring is NOT blue - I was rushing the description a bit too much
However, neither is it green. So turquoise it is then ...................and enunciated as 'terkwaas', never terkwoyse
All a bit confusing, really, since if you think of the semi-precious stone of the same name - then as we know, that colour is a very blue sort of blue.