Transparent – Can be seen through. Eight is the number ascribed to the most transparent colors, one the least.
Opaque – Can not be seen through – covers up everything beneath it. Number one is the most opaque.
Translucent –Allows some light to pass through the color layer. The numbers between one and eight (most translucent) show the degree of translucency. This info is on each tube of paint.
Value - The lightness or darkness of your paint.
Hue - The color. Blue, Red, yellow, – what ever the color is called.
Saturation - How strong the color is. Saturation is the difference of a color against its own brightness. Acrylics are highly saturated. It takes a lot to tame them down.
Chroma - Purity of a color. Chroma is the difference of a color against the brightness of another color, which appears white under similar viewing conditions.
The C.I. (Colour Index)- Name is an internationally recognized code assigned to a particular “colorant. ” Consists of: type of dye or pigment; (For example, PW 3, Zinc White, indicates a specific Pigment White;) general hue and serial number
Light Fastness or Permanency - This is a number that indicates how long you can expect the pigment to last. Rating I is excellent, it will be here for your great-great grandchildren. II is not bad, but Rating III is fugitive (will disappear). My very first oil paintings had Alizarin Crimson as focal points and all ready they have faded. So, my advice read the labels.
By the way there is now an Alizarin Crimson that does not fade, called Permanent Alizarin Crimson, check to see which one you have. Donate the non-permanent one to your grandkids to paint the town red with!
Tints – Color (hue) with white added
Shades – Color (hue) with black added (in theory, but that’s another story. )
Aerial perspective – Subjects in the distance are cooler (bluer) and lighter in value than things in the foreground.