Different shades of blue are all the rage this summer, according to Glamour magazine’s eyeshadow gurus. Whether silvery, icy light blue, glittering royal blue or bright turquoise – the entire palette is currently landing on the eyelid. It’s not a totally new trend. According to Vogue, blue eyeshadow had its biggest moment back in the Swinging Sixties when models such as Edie Sedgwick, Jean Shrimpton or Twiggy flaunted “huge, doe-eyed looks with double rows of false lashes, bold geometric shapes and blue eyeshadow.” Around the turn of the millenium, it was popstars such as Britney Spears and Ch…