1. Tone: Purple and blue have different tones. Purple is a mixture of blue and red, and its hue is between blue and red. Blue is a single color, and its hue is close to the color of the sky or the ocean.

2, color feeling: purple gives people a mysterious and romantic feeling, usually associated with elegance; On the other hand, blue gives people a sense of calm and tranquility, which is usually associated with coldness and clarity.

3. Visual effect: Due to the different color characteristics of purple and blue, they are also different in vision. Purple is usually brighter and more vivid than blue, while blue is softer and gentler.