**4.3 Visual design**

It is necessary to determine art style in the stage of specific design. The designer needs to judge what kind of expression form to use, what tonality to need, what elements to match, and how to match the music and dynamic effect, which requires strong control ability.

Intangible cultural heritage has certain popular science characteristics in the process of reproduction and dissemination. Therefore, from the perspective of visual design, it follows certain objective practical laws. If it has a certain narrative or plot, we need to find the corresponding reference to design the picture, conform to the theme in tonality and content, and find the appropriate soundtrack and sound effect.

In the HTML5 small program of Tibetan medicine mud mask, the author selects the colors with strong contrast and visual expression. In addition, some Tibetan elements are also used in the picture, such as Scripture barrel and prayer flags, which add distinctive regional characteristics to the picture (**Figure 4**). From understanding the small medicine mud mask to understanding the breadth and depth of Tibetan culture, this HTML5 is not only a way to promote a Tibetan skill, but also an opportunity to popularize Tibetan culture [7]. At the same time, these elements can also help the scene to be more coherent and smooth.

In terms of color matching, as the main content follows the traditional bright and exaggerated color matching of Tibetan style (**Figure 5**), in order to highlight the main body, distinguishes primary and secondary, and avoids the adverse experience of visual fatigue caused by watching high saturation colors for a long time, the author selects dark colors such as black, Tibetan blue, and red brown as the background color of HTML5, and appropriately uses materials such as gold thread to outline points and lines to enrich the composition of the picture, and prevent the background from being too monotonous and dull, so as to improve the texture of the whole HTML5.
