Callistemon and The exwife has touched on it - people who see objects /people as colours are demonstrating synaethesia .
Being shy and introverted at school I kept quiet about my seeing days of the week , months, names people ... as colours .
I recall having to arrange my coloured pencils and later all my art materials in particular colours.
Aged 70 - my pencils , pastels, acrylics /oils amd watercolours are still arranged in the same way .
Apparently, this is common /normal in children , but persists into adulthood particularly in artistic people :
Monday is blue
Tuesday red or pink
Wednesday green
Thursday black
Friday yellow
Saturday blue
And Sunday yellow again .
I think that the obvious seasons are reflected in the following :
January white
June lemon
July bright yellow
October burnt orange
December red and white .
Interestingly , my daughter a highly accomplished portrait artist doesn't exhibit synaethesia , but I do as a landscape , still life and abstract painter .