The color that one person sees may not be the same as the color another person sees, even though they're both being shown the same thing. Trust is an important factor in relationships, and people often end relationships with those they love due to a lack of trust.
This episode discusses how people's perception of color can vary and cause conflicts, with examples of how color correct vision and color blindness may lead to disagreements about the colors of objects.
Love is often considered the most important element in a romantic relationship, but the speaker believes that trust should rank number one. Without trust, even if there is love, the relationship will eventually fail.