a pair of good-looking contrasting colors

Quick answer：

The term 'a pair of good-looking contrasting colors' refers to a combination of two colors that are visually appealing when placed next to each other. In design and fashion, contrasting colors are used to create a striking visual effect. This can be achieved by using colors that are opposite each other on the color wheel, such as red and green, blue and orange, or yellow and purple. The key is to balance the colors so that they complement each other without overwhelming the viewer.