Takeaways

Contrast helps guide user attention
Different types of contrast can be combined for greater effect
Sufficient contrast is essential for accessibility
Contrast creates visual hierarchy

Principle of Contrast

Elements that are different from their surroundings are more noticeable and memorable.

Overview

The Principle of Contrast is a fundamental design concept that states that elements which stand out from their surroundings are more likely to capture attention and be remembered.

This principle is essential for creating visual hierarchy, guiding user attention, and emphasizing important elements in a design.

Applications in Design

Creating clear call-to-action buttons
Highlighting important information
Establishing visual hierarchy
Improving readability and accessibility

Types of Contrast

Type	Description	Example
Color	Differences in hue, saturation, or value	Red button on a blue background
Size	Variations in dimensions	Large headline with smaller body text
Shape	Different forms or outlines	Circular element among squares
Texture	Varying surface qualities	Smooth button on a textured background
Direction	Different orientations	Horizontal element in a vertical layout

Implementation Tips

Use contrast purposefully to guide attention
Ensure sufficient contrast for accessibility (WCAG guidelines)
Don't overuse contrast - too many contrasting elements create visual noise
Test contrast in different viewing conditions

Code Example

/* Example of color contrast for accessibility */
.button {
  background-color: #0070f3;
  color: white;
  /* WCAG AA requires 4.5:1 contrast ratio for normal text */
  /* WCAG AAA requires 7:1 contrast ratio for normal text */
}