false positive contrast ratio

[matti]

Product

axe-core

Product Version

No response

Latest Version

• I have tested the issue with the latest version of the product

Issue Description

Expectation

not false positive

Actual

false positive

How to Reproduce

https://www.kaalimato.com/catalog/Miehet+avautuvat+suorituspaineistaan_a_5816.html

has this button

which has background #009450

so

it's 3.92:1 which is above 3:1, so given that the calculated contrast ratio is 3.92:1, the button does meet the contrast requirements

Additional context

[benjaminhr]

+1

[dylanb]

You need to provide font weight and font size in order to determine whether it passes because 4.5:1 is required for small text.

Also, when I run axe DevTools on that page, I don't get an issue with that button

[WilcoFiers]

Axe is reporting this as needing manual review, not as a violation. The reason axe cannot test this is because axe can only test contrast in situations where it can reliably detect a background. Because the text node of this sticks out the top and bottom of the button a little axe cannot be sure whether there is a solid background or not.

[dylanb]

yes, and when it does overlap, there IS a color contrast problem as can clearly be seen in the screenshot