SC1-4-1-img

Check if images meet 1.4.1 Use of Color.

Status

1: First Draft

Open issues

• Failure F13 relates to two SCs. How to handle that?

Background

• G14: Ensuring that information conveyed by color differences is also available in text
• G111: Using color and pattern
• F13: Failure of Success Criterion 1.1.1 and 1.4.1 due to having a text alternative that does not include information that is conveyed by color differences in the image
• Comments from UWEM 2.0 draft:
• Not automatable.
• Cannot automatically determine if colour of images is used to convey information.

Description

This test checks …

Assumptions

Test procedure

UTT: Required user expertise and skills

Select one of:

1. no prior knowledge
2. basic understanding of HTML
3. basic understanding of WCAG
4. advanced understanding of WCAG

Specify: Are there any additional requirements for the user profile?
(i.e.: A question about images can’t be answered by a blind person.)

Test subject

Select one of:

1. HTML source (= unprocessed source of the web page)
2. DOM tree (= generated source after onload scripts are applied (no user interaction). CSS is taken into account so that elements that are not displayed are not tested.)
3. DOM and CSS (= same as 2. plus computed style for each element)
4. rendered page (= page as it is presented in a browser)

Specify: Does the test require the checking of multiple pages? (single page / multiple pages)

Selector (tool, user)

(CSS selector)

Step 1 (tool, user)

to do

Step 2 (tool, user)

to do