Add the missing colors on the monitoring dashboards

What does this MR do?

Adds the missing colors for the time_series.vue component for the monitoring dashboard

Issue: #198429 (closed)

Screenshots

Before	After

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content