diff --git a/lib/ex_aequo_colors/keywords.ex b/lib/ex_aequo_colors/keywords.ex
new file mode 100644
index 0000000..1471ebf
--- /dev/null
+++ b/lib/ex_aequo_colors/keywords.ex
@@ -0,0 +1,30 @@
+defmodule ExAequoColors.Keywords do
+  @moduledoc ~S"""
+  Tools to access keywords (to be moved to ExAequoBase) 
+  """
+
+  @doc ~S"""
+
+  Get first present value from a keyword list
+
+      iex(1)> access_or([a: 1, b: 2], [:b, :a])
+      2
+
+      iex(2)> access_or([a: 1, b: 2], [:x, :y])
+      nil 
+
+  or an explicit default
+
+      iex(3)> access_or([a: 1, b: 2], [:x, :y], :not_found)
+      :not_found 
+  
+  """
+  def access_or(kwd, accessors, default \\ nil) do
+    accessors 
+    |> Enum.reverse
+    |> Enum.reduce(default, fn index, result ->
+      Keyword.get(kwd, index, result)
+    end)
+  end
+end
+# SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/ex_aequo_colors/ui.ex b/lib/ex_aequo_colors/ui.ex
new file mode 100644
index 0000000..edd6a17
--- /dev/null
+++ b/lib/ex_aequo_colors/ui.ex
@@ -0,0 +1,52 @@
+defmodule ExAequoColors.Ui do
+  @moduledoc ~S"""
+  Some convenience methods to output colorized messages
+  """
+
+  @doc ~S"""
+    
+  The error function, by default
+
+    iex(1)> capture_io(fn -> error("OH NO") end)
+    "\e[31m\e[1mERROR: \e[0mOH NO\n"
+
+  or to a different device
+
+    iex(2)> capture_io(:stderr, fn -> error("OH NO", device: :stderr) end)
+    "\e[31m\e[1mERROR: \e[0mOH NO\n"
+
+  changing the label?
+
+    iex(3)> capture_io(fn -> error("OH NO", label: "BAD") end)
+    "\e[31m\e[1mBAD\e[0mOH NO\n"
+    
+  """
+  def error(message, options \\ []) do
+    _message(message, :error, "ERROR: ", options)
+  end
+
+  @doc ~S"""
+  The warning function, by default
+
+    iex(4)> capture_io(fn -> warning("Watch out!") end)
+    "\e[33m\e[1mWARNING: \e[0mWatch out!\n"
+  
+  """
+  def warning(message, options \\ []) do
+    _message(message, :warning, "WARNING: ", options)
+  end
+
+  @colors %{
+    error: "<red,bold>",
+    warning: "<yellow,bold>",
+  }
+
+  defp _message(message, type, prefix, options) do
+    device = Keyword.get(options, :device, :stdio)
+    color = Map.fetch!(@colors, type)
+    label = Keyword.get(options, :label, prefix)
+    result = ExAequoColors.Colorizer.colorize(color <> label <> "$" <> message)
+    IO.puts(device, result)
+  end
+end
+# SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/test/keywords_test.exs b/test/keywords_test.exs
new file mode 100644
index 0000000..88fe90a
--- /dev/null
+++ b/test/keywords_test.exs
@@ -0,0 +1,6 @@
+defmodule Test.ExAequoColors.KeywordsTest do
+  use ExUnit.Case
+
+  doctest ExAequoColors.Keywords, import: true 
+end
+# SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/test/ui_test.exs b/test/ui_test.exs
new file mode 100644
index 0000000..8e351d7
--- /dev/null
+++ b/test/ui_test.exs
@@ -0,0 +1,7 @@
+defmodule Test.ExAequoColors.UiTest do
+  use ExUnit.Case
+  import ExUnit.CaptureIO
+
+  doctest ExAequoColors.Ui, import: true 
+end
+# SPDX-License-Identifier: AGPL-3.0-or-later