I found a good match was Light Stone + appx 5% red oxide. Trouble is that was a rather matt finish.
To get gloss I recently found quite a good match at B&Q. Then got it home to find out it is this modern water colour stuff.
But going round those sort of stores is so irritating, paint all divided into bedroom, bathroom etc shades then themed into 'my mood', 'my theme', 'my chill' & all that sort of nonsense. Not a row of gloss paints in their various colours, but all spread around the place & themed. Grrh!