[Squeakland] sketch's color

When I enter "color" into the Search bar of a sketch's viewer, I see a tile called 'Sketch's color' with an assignment of a colored square. When I select "show categories" on the menu of this tile, I get "color & border". However, I don't see this tile in the "color & border" category. First question - why? Second question - and more important - why doesn't this tile actually change the color of my sketch?

Basically, I'm looking for ways of changing the color of a sketch - via scripting. Eventually I want to actually set the RGB values and realize I may have to revert to the underlying text/code of a tiled script.

Thanks, Randy