Some accessibility issues in the GUIs

[Kazaf123]

Description:
This issue aims to figure out some accessibility issues in the following GUI, and we appreciate if such issues could be fixed, which would bring great assistance for visually impaired users.

Accessibility Issues:

1. The color contrast of “搜索” box is relatively low, would it be adjusted?
2. All the recommended labels lack the content-descriptions to support to read
3. The buttons of “换一批” and“清空”are relatively small, and suffer from low color contrast.

Appreciate:
Thanks for reading this bug report and I really hope you will repair these issues for people using this App conveniently.