How to match two colors to look good

Quick answer：

To match two colors effectively, consider color theory principles such as complementary colors, analogous colors, or monochromatic schemes. Complementary colors are opposite each other on the color wheel, like red and green. Analogous colors are next to each other, like red and orange. Monochromatic schemes use various shades of a single color. Experiment with different combinations to see which one suits your aesthetic preference.