Aggressive colours:    The aggressive colours are the warm bright colours like: red, orange and yellows.

Black:   Black is not considered one of the primary colours because it can be mixed, but it's the sum of all colours.

White:   White can not be mixed and it's the absence of colour.

Hue:   Hue is just another name for colour like; red, yellow & blue..that's "hue".

Intensity or Chroma:   Intensity or Chroma refers to the dullness or brightness of a colour.

Primary colours:   Primary colours are pure pigments with high intensity. They can not be mixed from any other colour. The three primary colours are:   red, yellow and blue. They are also known as #1 colours.

Key colour:   The key colour is the dominant colour in a colour scheme or mixture.

Receding colours:   Receding colours are the colours that give depth to your painting, they make your objects fade into the background. The receding colours are the cool colours like; the greens, blues and violets.

Secondary colours:  Secondary colours are the colours you get after mixing two primary colours like: orange, green and violet. They are also known as #2 colours.

Shade:   A Shade is when a colour is darker than the basic HUE. Shades are usually a colour of choice mixed with black. Mixing the colour of choice with black lowers the colours value and may be used for shading.

Tertiary or Intermediate colours:   Tertiary or Intermediate colours are the result of mixing a Primary colour with a Secondary colour. Tertiary colours are; yellow-green, blue-green, blue-violet, red-violet, red-orange, yellow-orange. They're also know as the #3 colours.

Tint:   Tint is usually the colour of choice plus white. A tint is when the colours are lighter than their basic HUE.

Tone:  To tone a colour is to lower its intensity by mixing the colour of choice with grey.

Warm colours:   Warm colour are the colours with the highest percentage of yellow or red.

Cool colours:   Cool colours are the colours with the highest percentage of blue.

Form:   To create form you need at least 3 Values, a light, medium and a dark. Value creates shape and then you have form. Form is very similar to SHAPE as it has length and width but it also has depth, making it a 3D object. The basic FORMS are cubes, spheres, cones, pyramids and cylinders.

Value:   It's a way of describing if the colour you're using is light or dark. Values is what creates form or 3D objects and spaces. A high Value on the Value Scale is very light. A low Value on the Value Scale is very dark.

Earth Tones:   Earth Tones are dark value and lowers intensity. Warm earth tones usually start with "Burnt", Cool earth tones start with "Raw". Warm earth tones are Burnt Umber, Burnt Sienna. Cool earth tones are Raw Sienna, Raw Umber, Yellow Ochre and sometimes olive green will work to tone down a colour.
Raw Umber is a yellow green, Raw Sienna is a yellow orange, Yellow Ochre is a dull yellow.

Transition colours:   On the colour wheel Yellow-Green and Red Violet are transition colours. Red-Violet will warm Violet and Yellow-Green will cool Yellow.

Principles of Design or Formal qualities of Art:   The formal qualities of Art are balance, gradation, dominance, repetition, pattern, unity, rhythm and movement. Artist use the principles to organize and communicate their ideas.

The Elements of Design are:    Unity, line, contrast, form, space, centre of interest, value and texture.

Center of interest:   Center of interest is usually the lightest and the brightest of anything on your composition. Center of interest grabs your eye first. It's the focal point.

Contrast:   Contrast will be, is it dark or light. Rough or smooth.

Dominance:   Dominance is the focus or the main point of the picture, focal point or the centre of interest.

Gradation:   Gradation is the gradual shifting from one extreme to another. Quite often you'll see gradation of colour used as shading in Folk Art.

Line:    Line is the most basic element of design. Lines can express different feelings and emotions depending how the artist uses them.

Expressive Properties:   Expressive properties are those that involve mood and feelings represented in the work of art.

Physical Properties:   Physical properties are those that involve the Media.

Rhythm and Movement:   Rhythm and Movement is used to create the look and the feeling of movement in a composition. It also guides the viewers eye.

Shapes are:    The four basic line shapes in the properties of art are created when a line begins and ends at the same point. All shapes are flat with only two dimensions; length and width. The four basic shapes are circles, rectangles, squares and triangles.

Space:    Space it refers the negative space around the centre of interest.

Unity:   Unity is the arrangement of elements and principles to create a feeling of wholeness. There's unity when there's something similar to pull it all together and it's pleasing to the eye.

Variety:   Variety is a way of combining different elements. Variety is used to add detail, interest, diversity and change.