For me purple is akin to the syntax 'pre'. It is linked to me before I 'existed' as a person, and the Universe, before it was a Universe. Purple is quite an abstract thing for me.
But very vivid too.
The truth is, in the beginning, or the pre-beginning, everything was purple for a long time. And when I say 'everything' I don't really mean 'every' 'thing' because there was actually 'nothing'. Just...me before there was a me, just- purple. A purple sea with no shores and no skies. Just sea. A very dark colour similar to the stain of a murex. And there were also sounds accompanying this- very muffled sounds, like being underwater in a beach full of people shouting and screaming and making sounds, like being inside a classroom while the rest of the children are outside running and jumping and screaming and vomiting and hurting and eating and crying and kissing and you can only hear faint sounds of all of these.
I sometimes wonder whether I was already born while I was seeing purple and hearing these sounds. Perhaps I was a newborn in the presence of a family celebrating Christmas or New Year's, thinking I was asleep, as the second-earliest memory is a more sorrowful one of me being refused the right of a dummy at my grandma's round the age of two and feeling helpless and distressed that I couldn't have my beloved dummy and being confused as to why I couldn't use it anymore.
I like to think of this purple as my Self dreaming me into existence.