diff --git a/lib/theme.cr b/lib/theme.cr
new file mode 100644
index 00000000..0c94e4c8
--- /dev/null
+++ b/lib/theme.cr
@@ -0,0 +1,120 @@
+require "colorize"
+
+module Theme
+  extend self
+
+  # Sets all the colors in termite.
+  #
+  # This is the preferred method of changing your terminal
+  # colors. It also lets you avoid a few edge cases that
+  # #set_back and #set_shell are prone to.
+  #
+  # The only downside to #set_terminal is that you have to
+  # open a new window in order for the changes to take effect.
+  #
+  # It is also possible to have several windows open each
+  # with different themes; however, you should really only
+  # be using one theme at a time.
+  #
+  # NOTE: This method assumes that (1) `[color]` is at the
+  #       bottom of your config file. This method will
+  #       overwrite all lines after the `[color]` line.
+  #
+  # NOTE: This method assumes that you want `# vim:ft=dosini`
+  #       at the bottom of your config file.
+  def set_terminal(theme : Hash(YAML::Type, YAML::Type))
+    file : String = ENV["HOME"] + "/.config/termite/config"
+  end
+
+  # Sets the background color in termite.
+  #
+  # NOTE: This is particularly useful to avoid color flashing.
+  #       Color flashing occurs when the terminal background
+  #       gets changed to a different color by the shell
+  #       at startup.
+  #
+  # NOTE: You should avoid manually calling #set_back and
+  #       #set_shell. Instead, you should use #set_terminal
+  #       instead as this fixes a lot of edge cases.
+  def set_back(theme : Hash(YAML::Type, YAML::Type))
+    file : String = ENV["HOME"] + "/.config/termite/config"
+    if !File.exists?(file)
+      _e("The file " + File.expand_path(file) + " doesn't exist!")
+    end
+    config : String = ""
+    File.each_line(file) do |line|
+      if line.includes?("background = ")
+        line = "background = #" + theme["base00"].to_s
+      end
+      config += line + "\n"
+    end
+    File.write(file, config)
+  end
+
+  # Sets the terminal colors in the current shell.
+  #
+  # NOTE: To make this apply for all terminals (shells) you
+  #       open, simply call this method in each new instance.
+  #       This is the traditional method used by base16-shell;
+  #       however, it makes more sense to just change the
+  #       config file directly and avoid having to call an
+  #       external script every time you start a new terminal.
+  #
+  # NOTE: When using padding with terminals such as termite, the
+  #       background color for the terminal will take priority
+  #       over the background color for the shell. Therefore,
+  #       if you're using termite with padding, you should avoid
+  #       this method and simply use #set_terminal instead.
+  #
+  # NOTE: Another downside to using #set_shell is that colors
+  #       will be reset by commands like `tput reset`. Note
+  #       that #set_terminal does not have this issue.
+  def set_shell(t : Hash(YAML::Type, YAML::Type))
+    theme = t.clone
+    theme.each do |key, value|
+      theme[key] = value.to_s.insert(4, '/').insert(2, '/')
+    end
+    add_color      0, theme["base00"] # Black
+    add_color      1, theme["base08"] # Red
+    add_color      2, theme["base0B"] # Green
+    add_color      3, theme["base0A"] # Yellow
+    add_color      4, theme["base0D"] # Blue
+    add_color      5, theme["base0E"] # Magenta
+    add_color      6, theme["base0C"] # Cyan
+    add_color      7, theme["base05"] # White
+    add_color      8, theme["base03"] # Bright Black
+    add_color      9, theme["base08"] # Bright Red
+    add_color     10, theme["base0B"] # Bright Green
+    add_color     11, theme["base0A"] # Bright Yellow
+    add_color     12, theme["base0D"] # Bright Blue
+    add_color     13, theme["base0E"] # Bright Magenta
+    add_color     14, theme["base0C"] # Bright Cyan
+    add_color     15, theme["base07"] # Bright White
+    add_color     16, theme["base09"]
+    add_color     17, theme["base0F"]
+    add_color     18, theme["base01"]
+    add_color     19, theme["base02"]
+    add_color     20, theme["base04"]
+    add_color     21, theme["base06"]
+    fgbg_color    10, theme["base05"]
+    fgbg_color    11, theme["base00"]
+    cursor_color  12, ";7"
+  end
+
+  private def add_color(num : Int32, color : YAML::Type)
+    print "\033]4;#{num};rgb:#{color.to_s}\033\\"
+  end
+
+  private def fgbg_color(num : Int32, color : YAML::Type)
+    print "\033]#{num};rgb:#{color.to_s}\033\\"
+  end
+
+  private def cursor_color(num : Int32, color : String)
+    print "\033]#{num}#{color}\033\\"
+  end
+
+  private def _e(message : String)
+    puts message.colorize(:red)
+    exit 1
+  end
+end
diff --git a/src/theme.cr b/src/theme.cr
new file mode 100644
index 00000000..be683bad
--- /dev/null
+++ b/src/theme.cr
@@ -0,0 +1,23 @@
+require "theme"
+require "yaml"
+require "colorize"
+
+Dir.cd(ENV["HOME"] + "/Home/new-start")
+
+# Testing for now.
+file : String = ARGV.size > 0 ? ARGV[0] : "themes/atelier-cave-light.yaml"
+
+if !File.exists?(file)
+  _e("The file " + File.expand_path(file) + " doesn't exist!")
+end
+
+yaml : Hash(YAML::Type, YAML::Type) = YAML.parse(File.read file).as_h
+
+# Theme.set_terminal(yaml)
+Theme.set_shell(yaml)
+# Theme.set_back(yaml)
+
+private def _e(message)
+  puts message.colorize(:red)
+  exit 1
+end