The leaning of a colour towards another colour, for example, cadmium yellow has a bias towards orange, whereas lemon yellow is biased to green.
The substance that is added to the pigment to make it into a paint so that it will adhere to a painting surface.
This is normally gum arabic for watercolours or linseed oil for oils.
The method of combining two colours where they meet so that it is impossible to tell where one colour ends and the next begins. Blending is usually done with a brush, rag or finger. With pastel a torchon can also be used.
A test for lightfastness that compares a specimen colour with specimens of blue dyed wool that fade at a pre-determined rate when subjected to a high intensity light for a period of time. (British Standards BS 1006, EN 20105, ISO 105)
When colours are applied next to each other in small amounts, so that from a distance they appear to mix. This can result in a shimmering effect which can be used very successfully to capture the qualities of light.