Hue

The world has no color; it is in grayscale. The only color people see is the color their eyes are subject to. If they see a person who fits their standard, they will stand out of the crowd as the only one with color.

However, there are times when people fall in love with people whose color is confusing to their eyes. That is where the subjectivity of their colorblindness changes. A person who sees red as green will finally see red as red.

If they both fall in love, they share their colors, fill up a canvas, and create art. However, if their hearts break, they will see the world as gray again. It was always gray, it is just that they were so blinded by the brightness of the colors their brief love emitted that they momentarily failed to see the world in its dead colors.