Custom Less

Custom Less is a new preference introduced in Tiki 15 which replaces the (broken) theme generator available before the move to Bootstrap.

It can be found on the Customisation tab on the Look & Feel Control Panel.

This is an example of a fairly complete theme customisation of Yeti which seems to work just about everywhere in Tiki.

@gray-base:                         #597977;
@brand-primary:                     #9ab6b4;
@gray:                              #9ab6b4;
@border-radius-base:                3px;
@border-radius-large:               4px;
@border-radius-small:               2px;
@table-bg-accent:                   #f0f7f6;
@table-bg-hover:                    #cff3f1;
@navbar-default-link-hover-bg:      #597977;
@navbar-default-link-active-bg:     #597977;

You might be able to try it out here using this perspective. Note that the first time it customises a theme it will take a minute or two to recompile the CSS.