Select Color on WebApp

I need to have a user of my Webapp to choose a color from a color Picker.
I tried to use SelectColor, but it gives me a error. Does this not work for Web apps?

If so, does xojo have another way, or do I have to create my own?

Thanks in Advanced…

Technically, SelectColor only works in GUI applications and web apps are subclasses of a console app.

this would make a good feature request though.

Web custom controls has a yui2ColorPicker:

Have not used it and do not own a license of their software but it seems to do what you’re looking for.