Sorting by spectrum

[Walter Vaughan]

I know this seems like a weird idea, but I know several developers
are in the flooring industry and someone may have come up with
a solution....

I need to sort records by their RGB (Red/Green/Blue) value
into spectrum order.

I have three fields with 0-255 values. (0/0/0 would be black,
255,255,255 would be white).

Any ideas, please post 'em here, cause I really
don't even have an idea how you could map cycling
or cosine shaped values into something sortable.

This comes from wanting browns and yellows and pinks grouped.

I also have pantone values, but that's not going to help,
unless you have special insight into the seemingly random
assignation of numbers.

--
Walter