Description

The current datavis colors were designed to fulfill color contrast requirements only in dark mode. With the introduction of High Contrast Mode (HCM) we need to ensure that those colors have a required color contrast in both color modes (light and dark).

After trying out the update for adding high contrast mode versions for dataVis colors in LIGHT mode as a PoC (issue), we want to implement the changes into EUI.

The changes were added on EUI side on this PoC branch (commit)
On Kibana side it's added on this branch and deployed here

Updates

1. add support for using HCM switching on the theme (done in PoC)
2. provide dataVis HCM token overrides (done in PoC)
3. provide severity HCM token overrides

unknown: shade70
neutral: skyBlue70
success: success80
warning: warning80
risk: risk70
danger: danger70