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Accessible visual design

The luminance difference between foreground and background colours.

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Prerequisites

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Study notes

Colour contrast

The luminance difference between foreground and background colours.

Text alternative

A textual equivalent describing the purpose of meaningful non-text content.

Legibility

How easily individual characters can be distinguished.

Readability

How comfortably longer text can be read and understood in context.

Worked examples

Which term best matches this description: The luminance difference between foreground and background colours.

Colour contrast is the matching concept in this lesson.

Colour contrast

Which term best matches this description: A textual equivalent describing the purpose of meaningful non-text content.

Text alternative is the matching concept in this lesson.

Text alternative

Check your understanding

  1. Which concept would you apply first in a situation where how easily individual characters can be distinguished.

    1. Readability
    2. Colour contrast
    3. Legibility
    4. Text alternative

  2. Name the concept described as: How comfortably longer text can be read and understood in context.

  3. Which statement about Colour contrast is most accurate?

    1. A textual equivalent describing the purpose of meaningful non-text content.
    2. How easily individual characters can be distinguished.
    3. The luminance difference between foreground and background colours.
    4. How comfortably longer text can be read and understood in context.

  4. Explain one important difference between Colour contrast and Text alternative.

Answers and marking guidance

Answers and marking notes
  1. Legibility

    The scenario directly calls for Legibility.

  2. Readability

    The intended concept is Readability.

  3. The luminance difference between foreground and background colours.

    The definition in the lesson notes gives the required condition.

  4. Colour contrast: The luminance difference between foreground and background colours. Text alternative: A textual equivalent describing the purpose of meaningful non-text content.

    Credit a clear distinction using both definitions and an appropriate example if supplied.

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