What color is topcoat?

What color is topcoat depends on application, as topcoat can be any color or clear. In house painting, topcoat is final paint layer that provides true color, so topcoat can be any color you choose, white, gray, beige, blue, green, or any custom color, not limited to one color. For example, interior wall topcoat may be soft white, living room topcoat may be light gray, bedroom topcoat may be blue. In woodworking, topcoat is often clear, such as clear polyurethane, clear varnish, or clear lacquer that shows wood color underneath, but can also be tinted or colored. In automotive painting, topcoat includes base color coat which can be any car color like red, black, silver, plus clear coat which is clear. In nail care, topcoat is usually clear to add shine over color, but there are also matte topcoats and glitter topcoats. In fashion, topcoat as garment can be any color like camel, black, navy, gray. So topcoat color is not fixed, it can be clear or any color depending on purpose. For walls, topcoat color is whatever paint color you select, for wood protection, topcoat is typically clear, for car, topcoat is color plus clear.