In 2018 to celebrate the 40th Anniversary of Raymond Briggs The Snowman, the Royal Mint released a special Limited Issue Snowman 50p Fifty Pence Silver Proof Coin struck in solid .925 Sterling Silver colourised by the Royal Mint which is the Snowman's Blue Hat, Blue Scarf and Dressing Gown which is not Green like the original.
The reverse designed by Natasha Ratcliffe features the boy and snowman soaring through the nite sky above Brighton Pier while the obverse features the Fifth Portrait of Her Majesty Queen Elizabeth II by Jody Clark.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.
The last picture is the official colours of the Royal Mint issue so you can see the difference.