1, auspicious atmosphere contrast: Red is a color closely related to auspiciousness and celebration in China culture. On the occasion of housewarming, choosing a red gift box can create a more festive, lively and auspicious atmosphere, which echoes the overall atmosphere of housewarming activities. Black, on the other hand, has no obvious auspicious meaning and cannot bring people the same feeling of celebration and blessing.

2. Contrast of attention attraction: Red is an eye-catching and eye-catching color, which is easier to attract people's attention. Choosing red gift box as the packaging of housewarming gift can attract people's attention and make the gift more conspicuous, while black is relatively low-key and has no obvious eye-catching effect, so it is difficult to stand out from people's attention.