1. Option: Option: Question: Option: Permanently visible
palette of colors
Option:
Pop-up menu
with a color wheel
Question:
How to select the colors
Option:
User types in percent
red, green, and blue
in a dialog box

2. Question: How to appropriate available screen space Question: Option:
How to select the colors
Option:
Permanently visible
palette of colors
Pop-up menu
with a color wheel
User types in percent
red, green, and blue
in a dialog box
Criterion:
Takes up screen
real estate
Criterion:
Many colors can
be selected
Criterion:
High precision in
color specification
User Test:
Very few users can
specify color blends
correctly