Blockx, Oil Color, Naples Yellow Reddish - Tube 200ml. The range of extra fine oil colors from Blockx includes 105 vibrant shades, all of which exhibit exceptional lightfastness (rated 7/8 on the international BWS measurement scale). The extra fine oil colors from Blockx are primarily made from pure monopigments, without the addition of fillers or additives. Thanks to the unique traditional manufacturing method of grinding on porphyry stone, combined with traditional binders, the creamy textures of Blockx oil colors are highly concentrated in color.