Version 2.0 Color Rules

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Contents

Color Rule Details

Color Rule 1: Text must/should exceed CCR of 4.5

Property Value(s) Up To Date
Definition Text content must/should exceed Color Contrast Ratio (CCR) of 4.5 for any size text or 3.1 for large and/or bolded text yes
Summary Text must/should exceed CCR of 4.5 yes
Purpose
  • The higher the color contrast of text the more easy it is to read, especially for people with visual impairments
yes
Rule ID COLOR_1 yes
NLS Rule ID Color Rule 1 yes
Techniques
  • Change the foreground color to a more complemtary color to the background color
  • Change the background color to a more complemtary color to the foreground color
yes
Manual Checks none yes
Scope Element yes
WCAG 2.0 Primary 1.4.3 yes
WCAG 2.0 Related
  • 1.4.1
  • 1.4.6
yes
Language Dependency empty string yes
Rule Category Color yes
Target Resources
  • textnodes
yes
Target Resources Description All elements with text content yes
Resource Properties
  • color_hex
  • background_color_hex
  • background_image
  • is_large_font
  • color_contrast_ratio
yes

Color Rule 1: Rule Result Messages

Property Value(s) Up To Date
All Pass: Singular Text element has a CCR > 4.5 yes
All Pass: Plural  %N_P text elements have a CCR > 4.5 yes
Manual Check: Singular 1 element requires manual checking for CCR > 4.5 due to the use of background image yes
Manual Check: Plural  %N_MC elements require manual checking for CCR > 4.5 due to the use of background images yes
Some Fail  %N_F out of %N_T text elements do NOT have a CCR > 4.5 yes
All Fail: Singular 1 text element does NOT have a CCR > 4.5 yes
All Fail: Plural  %N_F text elements do NOT have a CCR > 4.5 yes
Corrective Action: Singular change the foreground and background colors of the text element to meet the CCR > 4.5 requirement yes
Corrective Action: Plural change the foreground and background colors of the %N_F text elements to meet the CCR > 4.5 requirement yes
Not Applicable No text elements on page yes

Color Rule 1: Node Result Messages

Property Value(s) Up To Date
Pass 1 CCR exceeds 4.5 yes
Pass 2 empty string yes
Pass 3 empty string yes
Manual Check 1 Background image may reduce color contrast yes
Manual Check 2 Background image may improve color contrast yes
Manual Check 3 empty string yes
Corrective Action 1 Adjust foreground and background colors to improve color contrast yes
Corrective Action 2 empty string yes
Corrective Action 3 empty string yes
Hidden (i.e. thru css) Text is hidden from asssistive technologies. yes
Presentation (i.e. role=presentation) empty string yes
Other empty string yes

Color Rule 2: Text must/should exceed CCR of 7.0

Property Value(s) Up To Date
Definition Text content must/should exceed Color Contrast Ratio (CCR) of 7.0 for any size text or 4.5 for large and/or bolded text yes
Summary Text must/should exceed CCR of 7.0 yes
Purpose
  • The higher the color contrast of text the more easy it is to read, especially for people with visual impairments
yes
Rule ID COLOR_2 yes
NLS Rule ID Color Rule 2 yes
Techniques
  • Change the foreground color to a more complemtary color to the background color
  • Change the background color to a more complemtary color to the foreground color
yes
Manual Checks none yes
Scope Element yes
WCAG 2.0 Primary 1.4.6 yes
WCAG 2.0 Related
  • 1.4.1
  • 1.4.3
yes
Language Dependency empty string yes
Rule Category Color yes
Target Resources
  • textnodes
yes
Target Resources Description All elements with text content yes
Resource Properties
  • color_hex
  • background_color_hex
  • background_image
  • is_large_font
  • color_contrast_ratio
yes

Color Rule 2: Rule Result Messages

Property Value(s) Up To Date
All Pass: Singular Text element has a CCR > 7.0 yes
All Pass: Plural  %N_P text elements have a CCR > 7.0 yes
Manual Check: Singular 1 element requires manual checking for CCR > 7.0 due to the use of background image yes
Manual Check: Plural  %N_MC elements require manual checking for CCR > 7.0 due to the use of background images yes
Some Fail  %N_F out of %N_T text elements do NOT have a CCR > 7.0 yes
All Fail: Singular 1 text element does NOT have a CCR > 7.0 yes
All Fail: Plural  %N_F text elements do NOT have a CCR > 7.0 yes
Corrective Action: Singular change the foreground and background colors of the text element to meet the CCR > 7.0 requirement yes
Corrective Action: Plural change the foreground and background colors of the %N_F text elements to meet the CCR > 7.0 requirement yes
Not Applicable No text elements on page yes

Color Rule 2: Node Result Messages

Property Value(s) Up To Date
Pass 1 CCR exceeds 7.0 yes
Pass 2 empty string yes
Pass 3 empty string yes
Manual Check 1 Background image may reduce color contrast yes
Manual Check 2 Background image may improve color contrast yes
Manual Check 3 empty string yes
Corrective Action 1 Adjust foreground and background colors to improve color contrast yes
Corrective Action 2 empty string yes
Corrective Action 3 empty string yes
Hidden (i.e. thru css) Text is hidden from asssistive technologies. yes
Presentation (i.e. role=presentation) empty string yes
Other empty string yes

new rule nls id : new rule summary

Property Value(s) Up To Date
Definition definition NO
Summary summary NO
Purpose
  • purpose 1
  • purpose 2
  • purpose 3
  • purpose 4
NO
Rule ID rule id NO
NLS Rule ID rule nls id NO
Techniques
  • technique 1
  • technique 1 url
  • technique 2
  • technique 2 url
  • technique 3
  • technique 3 url
  • technique 4
  • technique 4 url
NO
Manual Checks
  • manual check 1
  • manual 1 url
  • manual check 2
  • manual 2 url
  • manual check 3
  • manual 3 url
  • manual check 4
  • manual 4 url
NO
Scope Element or Page NO
WCAG 2.0 Primary X.X.X NO
WCAG 2.0 Related
  • Y.Y.Y
  • Z.Z.Z
NO
Language Dependency empty string NO
Rule Category Color NO
Target Resources
  • element 1
  • element 2
NO
Target Resources Description target resource nls description NO
Resource Properties
  • property 1
  • property 2
NO

new rule nls id : Rule Result Messages

Property Value(s) Up To Date
All Pass: Singular empty string NO
All Pass: Plural empty string NO
Manual Check: Singular empty string NO
Manual Check: Plural empty string NO
Some Fail empty string NO
All Fail: Singular empty string NO
All Fail: Plural empty string NO
Corrective Action: Singular empty string NO
Corrective Action: Plural empty string NO
Not Applicable empty string NO

new rule nls id : Node Result Messages

Property Value(s) Up To Date
Pass 1 empty string NO
Pass 2 empty string NO
Pass 3 empty string NO
Manual Check 1 empty string NO
Manual Check 2 empty string NO
Manual Check 3 empty string NO
Corrective Action 1 empty string NO
Corrective Action 2 empty string NO
Corrective Action 3 empty string NO
Hidden (i.e. thru css) empty string NO
Presentation (i.e. role=presentation) empty string NO
Other empty string NO
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