Module 08 Summary

What this module established

Colour must encode identity, quantity or emphasis. If removing it loses no information, it was decoration - and decoration costs the reader attention.

Carry forward

• Compute the contrast ratio rather than judging it. Your monitor is not the medium it will be read on.
• Do not encode meaning in red versus green. Prefer blue/orange and vary lightness as well as hue.
• Position is the strongest channel and colour the fourth. Move the finding to the top-left before reaching for a colour.

Before moving on

Move on when every contrast ratio is computed, no meaning rests on hue alone, and each chart survives greyscale.

Mark complete