Liturgical colours -try again

I've been thinking a bit about this subject in odd moments. Two main reasons for doing so are the acceptance by European churches of the idea of a new liturgical season: Creationtide and the fact that for most of us the colour purple does not seem a very natural colour to associate with penitence. This latter point comes to me in college when explaining liturgical colours to those from traditions that don't really have them and for whom purple probably has regal overtones -not at all penitential.

Now I quite like liturgical colours; but I'd also like them to have cultural resonance. Therefore, beyond my remarks in the first paragraph, I'd add the fact that while red does make sense as a colour for martyrs, and for the Holy Spirit (if we focus on the fire imagery), it is also quite a big colour in western secular culture at Christmas, as is green. Then if we seek to find a colour for creationtide (September, basically, before you ask), we are left with probably green as the most likely; but that's the colour of 'ordinary time' in the Roman system which we Anglicans take as our reference point. We might therefore want to consider either a different colour for creationtide or for ordinary time.

Can we do that? Well, I think we can. According to the C of E's site, on this page Rules to Order the Christian Year we are reminded: "...liturgical colours ... are not mandatory and traditional or local use may be followed." There is no canon law about it -unlike Roman Catholicism, but like eastern Orthodoxy. We should also note that historically there has been diversity in usage at a local level.

So, actually, we can come up with a new schema if we wish. THe downside would be to lose a degree of interchangeability and common practice. On the other hand, if we come up with a good idea, it may spread. So here are some suggestions I'd like to make.
Let's widen the palatte: where are the sunny yellow, orange or blues? Grey? Black? Brown?
In Lent, don't use purple. Use sackcloth or hessian. At Christmas use a variety of colours, probably majoring on red and green with some white. Creationtide might be a rainbow, or a sunny yellow. Or maybe green and change the ordinary time colour -maybe to a blue? Or grey? Or some other neutral colour like cream or brown? Though brown might be quite a good one for Lent along with or instead of hessian (which is pale brown, of course).

So here's my suggestion for a revised liturgical colour scheme.
Kingdom: Purple
Advent: red and green
Christmas: add gold and/or white
Epiphany: gold and white
Lent: brown and sackcloth
Holy Week: red -preferably a dark wine red.
Easter: White
Ascension: how about sky blue?
Pentecost: Bright yellow or orange
Trinity: difficult this one -probably white (but how about the three primary colours?)
Transfiguration (which I think should be a season): white
Creation: green
Ordinary time: grey or beige

Any other ideas? And of course, remember you can experiment if you're CofE