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The Gantt chart does not use PatternFly colors.
Update colors of Gantt Chart to match PatternFly colors.
OU-513 Update colors of Gantt Chart to match PatternFly colors (upstream)
OU-538 Upgrade Perses to v0.48.0
openshift/distributed-tracing-console-plugin#53: OU-514: Use PatternFly charts colors