HUMANS HAVE DIFFERENT EYE CELLS IN THEIR EYES SO THAT BASICALLY MEANS MY RED ISN'T THE SAME AS YOUR RED.
EVERYONE PERCIEVE COLOR IN A DIFFERENT WAY AND THEIRS NO WAY TO DESCRIBE TO ANYONE WHAT YOU'RE SEEING .
FOR INSTANCE I BEEN TAUGHT MY BLUE IS RELATED WITH ICY YOU HAVE BEEN TO. BUT WHAT IF MY BLUE LOOKS GREEN TO YOU BUT I ASSOCIATE MY BLUE WITH ICY. YOU WOULD THINK IT'S WEIRD TO ASSOCIATE THE COLOR GREEN WITH ICY BUT I BEEN TAUGHT THAT MY BLUE IS ASSOCIATE WITH ICY LOL.
SOMEONE GREEN IS SOMEONE ELSES PURPLE