RGBW Colorpicker

[Jakubsza (Jakub Szabat)]

Hi,
Is there any (easy) way to change default RGB colorpicker by adding a slide bar for a white diode?
I’d like to make it something like this:

Thanks for your response

[rlkoshak (Rich Koshak)]

You would write your own web page and display it on your sitemap using the webview element.