Atheme is a complete “look and feel,” customizing the appearance of all the widgets.

Astyle is the description of the appearance of one kind of widget. Each theme comes with a predefined set of styles, but you can customize the built-in styles or create your own new styles.

The phrase “kind of widget” in the previous paragraph technically refers to the “class” of a widget. However, in thettk world, this is different from Python classes. Withinttk, the class of a widget is a character string. For example, thettk class of a stockButton widget is the string'TButton'.

Each style is composed of one or moreelements. For example, the style of a typical button has four elements: a border around the outside; a focus element that changes color when the widget has inputfocus; a padding element; and the button's label (text, image, or both).

Section 48, “Finding and usingttk themes”.

Section 49, “Using and customizingttk styles”.

Section 50, “Thettk element layer”.