The phrase "nice color contrast" refers to the visual effect created when two colors are placed next to each other in such a way that they create an appealing combination. The contrast between the two colors can be achieved through different shades, hues or tones, and it is often used in graphic design, fashion, interior decoration, and art to make elements stand out more, enhance visual appeal, and improve readability. A nice color contrast helps to create a harmonious and visually pleasing composition by highlighting the differences between the two colors, while also creating a sense of balance and unity in the design.