diff --git a/lib/reline.rb b/lib/reline.rb
index bd763db164..47ae8ea235 100644
--- a/lib/reline.rb
+++ b/lib/reline.rb
@@ -601,15 +601,15 @@ def self.line_editor
 end
 
 Reline::Face.config(:default) do |face|
-  face.define :default, :default_style
-  face.define :enhanced, :default_style
-  face.define :scrollbar, :default_style
+  face.define :default, style: :default
+  face.define :enhanced, style: :default
+  face.define :scrollbar, style: :default
 end
 
 Reline::Face.config(:completion_dialog) do |face|
-  face.define :default, :white_foreground, :cyan_background
-  face.define :enhanced, :white_foreground, :magenta_background
-  face.define :scrollbar, :white_foreground, :cyan_background
+  face.define :default, foreground: :white, background: :cyan
+  face.define :enhanced, foreground: :white, background: :magenta
+  face.define :scrollbar, foreground: :white, background: :cyan
 end
 
 Reline::HISTORY = Reline::History.new(Reline.core.config)
diff --git a/lib/reline/face.rb b/lib/reline/face.rb
index ee2531dfe6..d9066825d4 100644
--- a/lib/reline/face.rb
+++ b/lib/reline/face.rb
@@ -1,53 +1,56 @@
 class Reline::Face
   SGR_PARAMETERS = {
-    # Foreground
-    black_foreground: 30,
-    red_foreground: 31,
-    green_foreground: 32,
-    yellow_foreground: 33,
-    blue_foreground: 34,
-    magenta_foreground: 35,
-    cyan_foreground: 36,
-    white_foreground: 37,
-    bright_black_foreground: 90,
-    gray_foreground: 90,
-    bright_red_foreground: 91,
-    bright_green_foreground: 92,
-    bright_yellow_foreground: 93,
-    bright_blue_foreground: 94,
-    bright_magenta_foreground: 95,
-    bright_cyan_foreground: 96,
-    bright_white_foreground: 97,
-    # Background
-    black_background: 40,
-    red_background: 41,
-    green_background: 42,
-    yellow_background: 43,
-    blue_background: 44,
-    magenta_background: 45,
-    cyan_background: 46,
-    white_background: 47,
-    bright_black_background: 100,
-    gray_background: 100,
-    bright_red_background: 101,
-    bright_green_background: 102,
-    bright_yellow_background: 103,
-    bright_blue_background: 104,
-    bright_magenta_background: 105,
-    bright_cyan_background: 106,
-    bright_white_background: 107,
-    # Style
-    default_style: 0,
-    bold: 1,
-    faint: 2,
-    italicized: 3,
-    underlined: 4,
-    slowly_blinking: 5,
-    blinking: 5,
-    rapidly_blinking: 6,
-    negative: 7,
-    concealed: 8,
-    crossed_out: 9
+    foreground: {
+      black: 30,
+      red: 31,
+      green: 32,
+      yellow: 33,
+      blue: 34,
+      magenta: 35,
+      cyan: 36,
+      white: 37,
+      bright_black: 90,
+      gray: 90,
+      bright_red: 91,
+      bright_green: 92,
+      bright_yellow: 93,
+      bright_blue: 94,
+      bright_magenta: 95,
+      bright_cyan: 96,
+      bright_white: 97
+    },
+    background: {
+      black: 40,
+      red: 41,
+      green: 42,
+      yellow: 43,
+      blue: 44,
+      magenta: 45,
+      cyan: 46,
+      white: 47,
+      bright_black: 100,
+      gray: 100,
+      bright_red: 101,
+      bright_green: 102,
+      bright_yellow: 103,
+      bright_blue: 104,
+      bright_magenta: 105,
+      bright_cyan: 106,
+      bright_white: 107,
+    },
+    style: {
+      default: 0,
+      bold: 1,
+      faint: 2,
+      italicized: 3,
+      underlined: 4,
+      slowly_blinking: 5,
+      blinking: 5,
+      rapidly_blinking: 6,
+      negative: 7,
+      concealed: 8,
+      crossed_out: 9
+    }
   }.freeze
 
   class FaceConfig
@@ -57,25 +60,19 @@ def initialize(name, &block)
       define(:default) unless self.respond_to?(:default)
     end
 
-    def define(name, *sgr_values)
-      sgr_values.each do |value|
-        sgr_valid?(value) or raise ArgumentError, "invalid SGR parameter: #{value.inspect}"
-      end
-      sgr = "\e[" + sgr_values.map { |value|
-        case value
-        when Symbol
-          SGR_PARAMETERS[value]
-        when Hash
-          key, v = value.first
-          sgr_rgb(key, v)
-        end
-      }.join(';') + "m"
+    def define(name, foreground: nil, background: nil, style: nil)
+      values = {}
+      values[:foreground] = foreground if foreground
+      values[:background] = background if background
+      values[:style] = style if style
+      sgr = format_to_sgr(values)
       define_singleton_method(name) { sgr }
     end
 
     private
 
     def sgr_rgb(key, value)
+      return nil unless rgb_expression?(value)
       case key
       when :foreground
        "38;2;"
@@ -84,21 +81,28 @@ def sgr_rgb(key, value)
       end + value[1, 6].scan(/../).map(&:hex).join(";")
     end
 
-    def sgr_valid?(sgr_value)
-      case sgr_value
-      when Symbol
-        SGR_PARAMETERS.keys.include?(sgr_value)
-      when Hash
-        sgr_value.count == 1 or return false
-        key, value = sgr_value.first
-        %i(foreground background).include?(key) or return false
-        rgb?(value) or return false
-      else
-        false
-      end
+    def format_to_sgr(values)
+      "\e[" << values.map do |key, value|
+        case key
+        when :foreground, :background
+          case value
+          when Symbol
+            SGR_PARAMETERS[key][value]
+          when String
+            sgr_rgb(key, value)
+          end
+        when :style
+          [ value ].flatten.map { |style_name| SGR_PARAMETERS[:style][style_name] }
+        end.then do |rendition_expression|
+          unless rendition_expression
+            raise ArgumentError, "invalid SGR parameter: #{value.inspect}"
+          end
+          rendition_expression
+        end
+      end.join(';') << "m"
     end
 
-    def rgb?(color)
+    def rgb_expression?(color)
       color.respond_to?(:match?) and color.match?(/\A#[0-9a-fA-F]{6}\z/)
     end
   end
diff --git a/test/reline/test_face.rb b/test/reline/test_face.rb
index b236e1672e..08e7f44a74 100644
--- a/test/reline/test_face.rb
+++ b/test/reline/test_face.rb
@@ -4,11 +4,11 @@ class Reline::Face::Test < Reline::TestCase
   class WithSetupTest < self
     def setup
       Reline::Face.config(:my_config) do |face|
-        face.define :default, :blue_foreground
-        face.define :enhanced, { foreground: "#FF1020" }, :black_background, :bold, :underlined
+        face.define :default, foreground: :blue
+        face.define :enhanced, foreground: "#FF1020", background: :black, style: [:bold, :underlined]
       end
       Reline::Face.config(:another_config) do |face|
-        face.define :another_label, :red_foreground
+        face.define :another_label, foreground: :red
       end
       @face = Reline::Face[:my_config]
     end
@@ -27,21 +27,21 @@ def test_not_respond_to_another_label
 
     def test_existing_config_override_default
       Reline::Face.config(:my_config) do |face|
-        face.define :default, :red_foreground
+        face.define :default, foreground: :red
       end
       assert_equal "\e[31m", Reline::Face[:my_config].default
     end
 
     def test_existing_config_override_false
       Reline::Face.config(:my_config, false) do |face|
-        face.define :default, :red_foreground
+        face.define :default, foreground: :red
       end
       assert_equal "\e[34m", Reline::Face[:my_config].default
     end
 
     def test_new_config_override_false
       Reline::Face.config(:new_config, false) do |face|
-        face.define :default, :red_foreground
+        face.define :default, foreground: :red
       end
       assert_equal "\e[31m", Reline::Face[:new_config].default
     end
@@ -56,10 +56,18 @@ def test_my_config_default
       assert_equal "\e[m", face.default
     end
 
+    def test_invalid_keyword
+      assert_raise ArgumentError do
+        Reline::Face.config(:invalid_config) do |face|
+          face.define :default, invalid_keyword: :red
+        end
+      end
+    end
+
     def test_invalid_foreground_name
       assert_raise ArgumentError do
         Reline::Face.config(:invalid_config) do |face|
-          face.define :default, :invalid_foreground
+          face.define :default, foreground: :invalid_name
         end
       end
     end
@@ -67,7 +75,7 @@ def test_invalid_foreground_name
     def test_invalid_background_name
       assert_raise ArgumentError do
         Reline::Face.config(:invalid_config) do |face|
-          face.define :default, :invalid_background
+          face.define :default, background: :invalid_name
         end
       end
     end
@@ -85,21 +93,26 @@ def setup
     end
 
     def test_rgb?
-      assert_equal true, @face_config.send(:rgb?, "#FFFFFF")
+      assert_equal true, @face_config.send(:rgb_expression?, "#FFFFFF")
     end
 
     def test_invalid_rgb?
-      assert_equal false, @face_config.send(:rgb?, "FFFFFF")
-      assert_equal false, @face_config.send(:rgb?, "#FFFFF")
+      assert_equal false, @face_config.send(:rgb_expression?, "FFFFFF")
+      assert_equal false, @face_config.send(:rgb_expression?, "#FFFFF")
     end
 
-    def test_sgr_valid?
-      assert_equal true, @face_config.send(:sgr_valid?, :white_foreground)
-      assert_equal true, @face_config.send(:sgr_valid?, { foreground: "#ffffff" })
+    def test_format_to_sgr
+      assert_equal(
+        "\e[37;41;1;3m",
+        @face_config.send(:format_to_sgr, foreground: :white, background: :red, style: [:bold, :italicized])
+      )
     end
 
-    def test_invalid_sgr_valid?
-      assert_equal false, @face_config.send(:sgr_valid?, { invalid_key: "#ffffff" })
+    def test_format_to_sgr_with_single_style
+      assert_equal(
+        "\e[37;41;1m",
+        @face_config.send(:format_to_sgr, foreground: :white, background: :red, style: :bold)
+      )
     end
 
     def test_sgr_rgb