Winsor & Newton have been producing Designers Gouache since 1935 and to this day we continue to offer the finest artists' gouache range available. Designers Gouache colors are a range of opaque water colors, mainly used by designers, illustrators and commercial artists to create vibrant illustrations in solid color. Gouache is also widely used in fine art as an opaque water color. Today the Designers Gouache range benefits from significant developments in technology and is smoother, flatter, more opaque and more brilliant than ever before. Permanent White is a strong white color. Based on Titanium pigments, it is an opaque color.