1, TINT: Contrast between blue and yellow, using a combination of cool and warm colors. The contrast between blue and orange is also a combination of cool and warm colors.

2. Emotion and effect: The contrast between blue and yellow often gives people a bright, positive and cheerful feeling, which is suitable for creating a vibrant and positive atmosphere. The contrast between blue and orange highlights the contrast effect. As a warm tone with high contrast, orange can create obvious visual contrast and eye-catching effect.