What is meant by the term "colourblindness"? How can using this term worsen injustices?

Colourblindness

A visual deficiency where an individual's perception of colors is limited or distorted, or a metaphorical reference to an approach of ignoring racial and ethnic differences supposedly promoting equality.

Injustices

Situations or actions that violate principles of fairness, morality, or legally established rights, often leading to discrimination or oppression.