[pygtk] convert r,g,b color definition is a color name

[awalter1]

Hi,
I am using the following method to modify color on a cell of a treeview:
tvcolumn = gtk.TreeViewColumn(title,cell,text=indx,background=col)
where col contains the color name to be used as 'red', 'green', ...
It works fine.

However, colors of my application are coming from gtk.ColorButton(). Thus I
get colours defined by r,g,b. then 3 values

I see 2 possibilities:
1- I convert my r,g,b definition into a colour name
2- the interface of gtk.TreeViewColumn allows to specify a column with r,g,b
definition.

For the time being, I have no idea to do one or the other.

Thanks
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