Accessibility: Landing Page

[AliceOrunitia]

Relating to the NGI Accessibility meeting found here:
https://github.com/rosenpass/org/blob/main/meeting-notes/external/ngi-accessibility/2023-06-26-accessibility.md

• Tab navigation requires higher contrast
• Contrast should be increased generally
• Down button cannot be focused when navigating with the tab button
• Differentiate focus visibility and normal visibility both with tab navigation and on hover
• URL anchors next to headings look like links, which is confusing
• Blue on turquoise is bad contrast, especially for links
• Colour phases need dedicated accessibility analysis. Perhaps dedicated colour schemes for multiple components?
• Code blocks should not be focused when using tab navigation. They also need a copy button, at least for vision impaired people. This will be a relatively difficult implementation with HugoCMS and Docsy.
• Syntax highlighting has low contrast