diff --git a/lib/irb/color.rb b/lib/irb/color.rb
index 51facaa4767861..852d18414b95dc 100644
--- a/lib/irb/color.rb
+++ b/lib/irb/color.rb
@@ -31,7 +31,9 @@ module Color
         on_heredoc_end:     [[RED],                   [Ripper::EXPR_BEG]],
         on_ident:           [[BLUE, BOLD],            [Ripper::EXPR_ENDFN]],
         on_int:             [[BLUE, BOLD],            [Ripper::EXPR_END]],
+        on_rational:        [[BLUE, BOLD],            [Ripper::EXPR_END]],
         on_float:           [[MAGENTA, BOLD],         [Ripper::EXPR_END]],
+        on_imaginary:       [[MAGENTA, BOLD],         [Ripper::EXPR_END]],
         on_kw:              [[GREEN],                 [Ripper::EXPR_ARG, Ripper::EXPR_CLASS, Ripper::EXPR_BEG, Ripper::EXPR_END, Ripper::EXPR_FNAME, Ripper::EXPR_MID]],
         on_label:           [[MAGENTA],               [Ripper::EXPR_LABELED]],
         on_label_end:       [[RED],                   [Ripper::EXPR_BEG]],
diff --git a/test/irb/test_color.rb b/test/irb/test_color.rb
index 3ba0c4c1ac62b4..3d0eee74d519ab 100644
--- a/test/irb/test_color.rb
+++ b/test/irb/test_color.rb
@@ -25,6 +25,8 @@ def test_colorize_code
       {
         "1" => "#{BLUE}#{BOLD}1#{CLEAR}",
         "2.3" => "#{MAGENTA}#{BOLD}2.3#{CLEAR}",
+        "7r" => "#{BLUE}#{BOLD}7r#{CLEAR}",
+        "8i" => "#{MAGENTA}#{BOLD}8i#{CLEAR}",
         "['foo', :bar]" => "[#{RED}'#{CLEAR}#{RED}foo#{CLEAR}#{RED}'#{CLEAR}, #{YELLOW}:#{CLEAR}#{YELLOW}bar#{CLEAR}]",
         "class A; end" => "#{GREEN}class#{CLEAR} #{BLUE}#{BOLD}#{UNDERLINE}A#{CLEAR}; #{GREEN}end#{CLEAR}",
         "def self.foo; bar; end" => "#{GREEN}def#{CLEAR} #{CYAN}#{BOLD}self#{CLEAR}.#{BLUE}#{BOLD}foo#{CLEAR}; bar; #{GREEN}end#{CLEAR}",