How to match red and blue card beautifully

Quick answer：

To match red and blue beautifully on a greeting card, consider using a color scheme that balances the intensity of the colors. Red is a warm color and blue is cool, so pairing them can create a striking contrast. A good approach is to use one color as the dominant one and the other as an accent. For instance, if the card is predominantly red, blue can be used as an accent color in elements like borders, patterns, or graphics. Alternatively, blue can be the main color, with red accents. Make sure the shades of red and blue are not too close in value to avoid a jarring effect. Using white or a neutral color for the card's background can also help to make the red and blue pop. Additionally, consider the context and the occasion; the card's design should complement the event or the person it's for.