The popup's close button fails all of the following <span title="Web Content Accessibility Guidelines">WCAG</span> success criteria: - [1.4.3 Contrast (Minimum)](https://www.w3.org/TR/WCAG21/#contrast-minimum) - [1.4.6 Contrast (Enhanced)](https://www.w3.org/TR/WCAG21/#contrast-enhanced) - [1.4.11 Non-text Contrast](https://www.w3.org/TR/WCAG21/#non-text-contrast)  (side note: PR https://github.com/Maps4HTML/Web-Map-Custom-Element/pull/281 unintentionally fixed contrast issues of attribution links. 😋)
The popup's close button fails all of the following WCAG success criteria:
(side note: PR #281 unintentionally fixed contrast issues of attribution links. 😋)