1. Pidgin

Many of the colors in the chat window can be changed using Style Properties. There are also some informations on the Pidgin Website. Other things are mentioned here.

1.1. Tab Colors

You can also change the colors used for the tabs when the remote use is typing, etc. See the following snippet:

# Pidgin checks whether a special style is available, and will only load its
# custom style if there is none. However, we still add the ': highest' so that
# theme switching to a theme using this feature works fine. (Themes that do not
# use this feature will behave badly if one switches to them from a theme that
# uses this feature.)
# Ideally Pidgin would instead use symbolic colors ...
style "pidgin_tab-label-typing" {
        fg[ACTIVE] = "#ff0000"  
}
widget "*tab-label-typing" style : highest "pidgin_tab-label-typing"

style "pidgin_tab-label-typed" {
        fg[ACTIVE] = "#ff0000"  
}
widget "*tab-label-typed" style : highest "pidgin_tab-label-typed"

style "pidgin_tab-label-unreadchat" {
        fg[ACTIVE] = "#ff0000"
}
widget "*tab-label-unreadchat" style : highest "pidgin_tab-label-unreadchat"

style "pidgin_tab-label-attention" {
        fg[ACTIVE] = "#ff0000"
}
widget "*tab-label-attention" style : highest "pidgin_tab-label-attention"

style "pidgin_tab-label-event" {
        fg[ACTIVE] = "#ff0000"  
}
widget "*tab-label-event" style : highest "pidgin_tab-label-event"