reading book colour codes - what is the order of the colours?

[Lycraphobe]

Ds1 is on yellowy orange books. What colours come next?

I think there is some universal colour ordering system but I don't know what it is... anyone??!

[lovecheese]

lilac, pink, red, yellow, blue, green, orange, turquoise, purple, gold, white, lime then to junior books and Im not sure of the order.

[reup]

There are a couple of different systems which makes things more confusing. Also some schools will not have the correct coloured stickers so may susbstitute grey for silver for example. My son has just gone from brown to grey, neither colour is on lovecheeses list.