Autumn is lovely; is it right for a May-born baby? I wouldn't have done it for that reason, but recognise I might be being slightly odd about that...
Scarlet does appear red, but 'red' itself doesn't, and neither does ruby. So it's about the shape of the word rather than its connotations though connotations do affect it in random and illogical ways.
I am open to cheeky pms, going into actual labour notwithstanding (am due Today!). Disclaimer - every synaesthete has their own unique set of associations - so the next one along will not have the same associations...
Synaesthesia is where you experience the sensation of one thing in response to a different kind of stimulus. So my synaesthesia is that everything conceptual has a colour. Words, people, places, times, letters and especially numbers - number/colour synaesthesia is the most common kind iirc. For me, thinking itself is coloured; numbers are strongest probably because they are the most stable kinds of concepts. People are coloured, but only when I think about them rather than when they are present. Days and weeks etc. ditto - when I think about them, they have a colour and sometimes a spatial dimension. It's not that I SEE the colour, rather I experience it on a physical level, which I recognise is a strange way to describe what colour is but I think it's probably to do with my particular synaesthesia that colour is more strongly a feeling than it is a visual thing. Some synasthetes 'see' the colour; some have totally different input/ responses - eg. seeing music, tasting sounds, hearing colours.
Synaesthesia is thought to occur when neighbouring brain regions share processing; this would suggest that I process colour in an undifferentiated way rather than discretely in a differentiated part of the brain. The ability to process one set of things in the terms of another is part of how we are capable of abstract thought and language so synaethesia is probably a variation on this basic capacity.