diff --git a/lib/irb/color.rb b/lib/irb/color.rb
index 94c4de831..c4513f5b0 100644
--- a/lib/irb/color.rb
+++ b/lib/irb/color.rb
@@ -77,7 +77,6 @@ module Color
 
     class << self
       def colorable?
-        # NOT using context.use_colorize? of IRB.conf[:MAIN_CONTEXT] because this method may be called before IRB::Irb#run
         $stdout.tty? && (/mswin|mingw/ =~ RUBY_PLATFORM || (ENV.key?('TERM') && ENV['TERM'] != 'dumb')) && IRB.conf.fetch(:USE_COLORIZE, true)
       end
 
diff --git a/lib/irb/context.rb b/lib/irb/context.rb
index 0a46c1b1d..e6c993d42 100644
--- a/lib/irb/context.rb
+++ b/lib/irb/context.rb
@@ -53,7 +53,6 @@ def initialize(irb, workspace = nil, input_method = nil)
       else
         @use_multiline = nil
       end
-      @use_colorize = IRB.conf[:USE_COLORIZE]
       @use_autocomplete = IRB.conf[:USE_AUTOCOMPLETE]
       @verbose = IRB.conf[:VERBOSE]
       @io = nil
@@ -186,8 +185,6 @@ def main
     attr_reader :use_singleline
     # Whether colorization is enabled or not.
     #
-    # A copy of the default <code>IRB.conf[:USE_COLORIZE]</code>
-    attr_reader :use_colorize
     # A copy of the default <code>IRB.conf[:USE_AUTOCOMPLETE]</code>
     attr_reader :use_autocomplete
     # A copy of the default <code>IRB.conf[:INSPECT_MODE]</code>
@@ -332,8 +329,6 @@ def main
     alias use_readline use_singleline
     # backward compatibility
     alias use_readline? use_singleline
-    # Alias for #use_colorize
-    alias use_colorize? use_colorize
     # Alias for #use_autocomplete
     alias use_autocomplete? use_autocomplete
     # Alias for #rc
diff --git a/test/irb/test_context.rb b/test/irb/test_context.rb
index b7e2370fd..64296d735 100644
--- a/test/irb/test_context.rb
+++ b/test/irb/test_context.rb
@@ -179,7 +179,6 @@ def test_output_to_pipe
     end
 
     def test_default_config
-      assert_equal(true, @context.use_colorize?)
       assert_equal(true, @context.use_autocomplete?)
     end