Use letters as a design element. Looking for the different styles or fonts can be fun and some letters just look good as a design. We will be using color schemes and characters to create the compositions.
Monochromatic - limited to variations of one hue, a hue with its tints and/or shades.

Triadic - uses three equally spaced colors on the color wheel.

Complement- any complementary pair. Two colors opposite each other on the color wheel. Add black and white for value changes.

Split Complement- Any complementary pair is chosen, then discard one color replacing it with the two colors on either side of that color on the color wheel. Such as Blue plus Yellow-Orange and Red-Orange. Again use black and white to change values and tones of gray.
Analogous- Any three to five colors located next to each other on the color wheel, plus black and white for value changes and tones of gray.

Colorwheel example.
Abstract art uses a visual language of form, color and line to create a composition which may exist with a degree of independence from visual references in the world.[1]
You should be able to control what will be noticed first, what is dominant in an image, and where the viewer's attention will go from there.
Charles Demuth, an American painter did this piece: I Saw the Figure 5 in Gold Date: 1928.
