These colours separate on the paper to give a mottled effect. When colour mixing, granulation can subdue colour mixtures. Granulating colours are marked on the colour charts. Where you paint The light in which you paint will affect your colour enormously. Wherever possible, paint in daylight.
North light is the preferred studio light because it is the most constant.
In the summer, avoid painting in direct sunlight or your painting will be too bright indoors. If painting in electric light, daylight bulbs are best. Conventional tungsten lighting is yellow whilst fluorescent strip lighting tends to be blue. You simply can't see which colours you're really mixing. But, once you're painting and enjoying it, you might start to wonder why some things don't work and this booklet will help.