Coloring issues by custom fields
This content is specific to single-choice select and multiple-choice select custom fields.
In your Jira instance, there may be options configured that are not appearing when you're setting colors in your Portfolio plan. This is because even if the options do exist in Jira, you can only set colors to the options that are being used in your plan.
For instance, you may have Change risk as a single-choice select custom field, with high, medium, and low as its options. Let's say the issues in your plan are set to only medium and low. Because high is not used by any issues in your plan, you can then only set colors for medium and low.
Change risk single-choice select custom field, with high not appearing as an option