Electric Blue jet plane contrail floating in sky above Cambridge UK 11aug21 225p

Electric Blue jet plane contrail floating in sky above Cambridge UK 11aug21 225p, im talking about the colour of contrail thats not name of the jet, Subscribe to my channel & Like each video thank you. .Always change quality to 4K or 1080p or original quality as Youtube default to a lower resolution so video doesnt look as good as it should ! ( click the icon like a cog to bottom right of each video each time you watch 1 of my videos ) ,If you like my video please click like & then copy & paste the link to your family and friends in an email or to Twitter or Facebook etc to promote my work and bookmark my account which is thanks for watching ! I upload videos every week that are a mix of Civilian & Military Aircraft as well as some other things I film like Wildlife. Airports/ Airshows I film at include Birmingham, Cambridge, Clacton, Dallas Texas, Duxford Air Shows, Fairford for RIAT Royal International Air tattoo air