Why is it significant that martyrs receive white robes in Revelation?

In Revelation 6, the souls of martyrs are seen under the altar crying out for justice, and they are given white robes, symbolizing their purity and righteousness. This is noteworthy as these robes are not rewards for their actions, but a gracious gift representing Christ's righteousness imputed to them through faith. Ephesians 2:8-9 reinforces this idea, emphasizing that salvation is a gift of grace and not a result of works. The white robes assure believers of their acceptance before God, reflecting the completeness of Christ’s work on their behalf. It is through His righteousness that the faithful are justified and able to stand before God in His holiness.