A Comprehensive Introduction to Python Programming and ... - MSDL

5.1 Specifying colors
5
Tkinter-specific Topics
Tkinter defines several color names that can be easily used as color values in Python
programs. These color names are taken from the names that are provided by X Windows.
The complete list is prodided in Appendix A on page 55. For a more precise
description of colors, Tkinter allows the use of color strings. These strings start with a
number sign (#) and specify the precise values of the red, green and blue components
of the color. There are three forms of color strings, depending on how many levels each
component is allowed:
#RGB : 4-bit components (12 bits total), 16 levels per component.
#RRGGBB : 8-bit components (24 bits total), 256 levels pre component.
#RRRRGGGGBBBB : 16-bit components, (48 bits total), 65536 levels per component.
R, G and B are single hexadecimal digits (0..F, or 0..f).
For example, “#F00”, “#FF0000” and “#FFFF00000000” all specify a pure red
color. Similarly, “#48A”, “#4080A0” and “#40008000A000” represent the same color.
5.2 Specifying Fonts
Tkinter provides several ways of defining fonts. It provides font descriptors that are
easier to work with than the very precise but too confusing X Window System font
descriptor. X Window System font descriptors are still supported, but they will not be
discussed here since they should be rarely needed. There are two other major kinds of
font descriptors that are available: in Tkinter: