You can customize the appearance of the Click&Clean menu by selecting one of the available color themes. A Multicolor is the default color theme in all Click&Clean versions (8.9.3+) that support this option. Please notice that this feature is not available in 8.9.2 and older versions.
You can change the color sheme of the Click&Clean menu right on this page. Just choose the one you like from the available themes below and tap on the "Apply Theme" button. Once you have applied a theme, you can open Click&Clean popup menu and see how it looks.