stylesheet: Basic recoloring

Defaults:

@define-color accent_color #3584e4;
@define-color accent_text #ffffff;

@define-color destructive_color #e01b24;
@define-color destructive_text #ffffff;

@define-color success_color #33d17a;
@define-color warning_color #e5a50a;
@define-color error_color #e01b24;

An example override:

@define-color accent_color #26a269;
@define-color accent_text white;

@define-color destructive_color #dc8add;
@define-color destructive_text alpha(black, .75);

@define-color success_color red;
@define-color warning_color purple;
@define-color error_color green;