Content Translation communicates issues such as errors and warnings to users with the issue cards (T189488). Paragraphs with issues are marked in red (for errors) or yellow (for warnings), and the issue cards use these same colors to strength the connection between the information an the markers.
For example, a warning is expected to look as shown below:
However, currently icons are shown in black as illustrated below:
The proposal is to show the error icon in red and the warning icon in yellow instead. If there are technical limitations to show these as icons, they can be added as images until the icon system provides a better way to support colors.