Unity is the sense that all the parts belong together. Variety is the differences that keep a work interesting. The two pull against each other, and good design balances them.
Key idea
Unity ties the parts together; variety adds interest. Too much sameness is dull; too much variety is chaos.
| To add unity | To add variety |
|---|---|
| repeat a color in several places | change the size of repeated shapes |
| limit the palette (one scheme) | add an accent color |
| use one kind of shape or line | contrast curved with straight |
| line things up; group them | vary the spacing and direction |
Why it works
The eye wants both order and surprise. With only order it gets bored; with only surprise it cannot find its way. Musicians use the same idea when they repeat a theme and vary it. Artists often start with a unifying idea (one scheme, one kind of shape) and then add a few planned differences.
Worked example: Fixing a busy poster
A poster uses eight colors, five fonts and shapes of every kind. It feels chaotic. Name two changes that add unity.
- The problem is too much variety.
- Limit the colors to one scheme, say three analogous hues plus a neutral.
- Use one or two fonts and repeat one kind of shape.
Answer: Limit the palette, and repeat fewer fonts and shapes.
Common mistake
Thinking unity means everything the same. Rows of identical gray squares are unified, and dull. Unity is about belonging together; it leaves room for differences in size, value, and a well-placed accent.