A message should not depend on color alone when the same information can be given by labels, patterns or symbols. A grayscale copy or a viewer's color perception may differ. Redundancy can improve access without requiring one artistic style.
Worked example
Two routes shown only in red and green can also be labeled A and B and use solid versus dashed lines.
Make It Your Own
Optional theme: a place that changes overnight. Design a diagram with two categories. Give each a readable label and a non-color cue, then check a pencil-only version. Describe one limitation you would still test with users. You may draw, write or tell your idea. Use invented characters and places; no personal information or upload is needed. This activity is not scored.
Reflect on your choices
- Retain the same meaning when color is removed.
- Explain one intentional choice and one possible alternative.
- There is no required style or single correct creative response.