score:5
I couldn't remember whether I knew of any barry or paley fields with color beside color or metal beside metal.
The first place I looked was Wikipedia.
The most basic rule of heraldic design is the rule of tincture: metal should not be put on metal, nor colour on colour (Humphrey Llwyd, 1568). This means that Or and argent (gold and silver, which are represented by yellow and white) may not be placed on each other; nor may any of the colours (i.e. azure, gules, sable, vert and purpure, along with some other rarer examples) be placed on another colour. Heraldic furs (i.e. ermine, vair and their variants) as well as "proper" (a charge coloured as it normally is in nature) are exceptions to the rule of tincture.
And:
Simple divisions of the field are considered to be beside each other, not one on top of the other; so the rule of tincture does not apply. In practice, however, fields divided into multiple partitions, such as barry or checky, use (with extremely rare exceptions) an alternating pattern of metal and colour for adjacent units.
https://en.wikipedia.org/wiki/Rule_of_tincture1
So according to this, your example of barry of eight sable and gules would violate the tincture rule. I know that barry of nine gules and sable, which equals gules, four bars sable, and any other variation with an odd number of parts, would violate the rule of tincture.
I have often seen illustrations of coats of arms that seem to have sable and another color, but don't because the argent parts were painted with silver paint that tarnished over time and turned black. For example, Hungary ancient might appear to be barry of eight, gules and sable, because the agent in the depiction was silver paint that turned black.
The article doesn't give the source for variations of the field being subject to the tincture rule, but does list several sources for the tincture rule in general.
Balfour Paul, James (1893). An Ordinary of Arms Contained in the Public Register of All Arms and Bearings in Scotland. William Green and Sons.
Boutell, Charles and A. C. Fox-Davies (2003). English Heraldry. Kessinger Publishing. ISBN 0-7661-4917-X.
Fox-Davies, Arthur Charles and Graham Johnston (1978). A Complete Guide to Heraldry. New York: Bonanza Books. ISBN 0-517-26643-1.
Heim, Bruno Bernard (1994). Or and Argent. Gerrards Cross, UK: Van Duren. ISBN 0-905715-24-1.
Llwyd of Denbigh, Humphrey (c1568). Dosbarth Arfau.
Neubecker, Ottfried (1997). Heraldry: Sources, Symbols and Meaning. London: Tiger Books International. ISBN 1-85501-908-6.
Spener, Philip Jacob (1690). Insignium Theoria. Frankfurt. Library of Congress record.
Woodc**k, Thomas and John Martin Robinson (1988). The Oxford Guide to Heraldry. Oxford: Oxford University Press. ISBN 0-19-211658-4.
Upvote:-2
Barry-wavy is but one example the tinctures NEXT TO EACH OTHER, not on. You can have colors next to colors and metals next to metals.