`window_frame`

This setting is applicable primarily on Wayland systems when client side decorations are in use.

It allows you to customize the colors of the window frame.

Some of these colors are used by the fancy tab bar.

lua

config.window_frame = {
  inactive_titlebar_bg = '#353535',
  active_titlebar_bg = '#2b2042',
  inactive_titlebar_fg = '#cccccc',
  active_titlebar_fg = '#ffffff',
  inactive_titlebar_border_bottom = '#2b2042',
  active_titlebar_border_bottom = '#2b2042',
  button_fg = '#cccccc',
  button_bg = '#2b2042',
  button_hover_fg = '#ffffff',
  button_hover_bg = '#3b3052',
}

You may explicitly add a border around the window area:

lua

config.window_frame = {
  border_left_width = '0.5cell',
  border_right_width = '0.5cell',
  border_bottom_height = '0.25cell',
  border_top_height = '0.25cell',
  border_left_color = 'purple',
  border_right_color = 'purple',
  border_bottom_color = 'purple',
  border_top_color = 'purple',
}

You may specify the font and font size for the tabbar:

lua

config.window_frame = {
  font = require('wezterm').font 'Roboto',
  font_size = 12,
}

The default font is Roboto. The default font_size is 10pt on Windows and 12pt on other systems.