The color schemes changes the colors of the code. They can change, for example, with which color the keywords are highlighted, with which color the line the caret is on is highlighted (needs
highlight_line to be set to
true in the preferences (not part of the cojor scheme)), what is the color of the caret, etc.
Many themes come with color schemes, or many packages contain plenty of them.
needs example of packages
The color scheme are defined in a
.tmTheme file. This is an XML file in the Property List format, which is used by many text editors.
The convention for the color schemes packages name is that they start with
Color Scheme -
Color Scheme - Focus first.tmTheme second.tmTheme ...