Yeah. In general, the first rule of heraldry ("metal should not be placed upon metal, nor color upon color") trumps the convention of "use standard heraldric colors." Gold touching silver violates the first rule; gold touching white violates only convention.
Yeah. In general, the first rule of heraldry ("metal should not be placed upon metal, nor color upon color") trumps the convention of "use standard heraldric colors." Gold touching silver violates the first rule; gold touching white violates only convention.