The color palette chosen for the Status indicator is not color-blind safe. The obvious overlay-ed symbol (check, exclamation, slash, dash) does however mitigate the problem substantially.
This can be validated using the Colorblind Web Page Filter page.
See additional comments regarding color choice on JENKINS-65850.
Would be nice to have standardization between this and the other UI color for status indicator elements.
ps: I like you choice of exclamation over "X" for Failed; avoids confusion, at least with the "X" - Delete or stop job, but exclamation conflicts with the pipeline graph view use of exclamation for "Unstable"