diff --git a/devel/ruby-red-colors/Makefile b/devel/ruby-red-colors/Makefile
index 86786db4a546..fac000054121 100644
--- a/devel/ruby-red-colors/Makefile
+++ b/devel/ruby-red-colors/Makefile
@@ -1,6 +1,6 @@
-# $NetBSD: Makefile,v 1.4 2021/08/22 13:55:46 taca Exp $
+# $NetBSD: Makefile,v 1.5 2024/02/19 15:07:09 taca Exp $
 
-DISTNAME=	red-colors-0.3.0
+DISTNAME=	red-colors-0.4.0
 CATEGORIES=	devel
 
 MAINTAINER=	pkgsrc-users@NetBSD.org
diff --git a/devel/ruby-red-colors/PLIST b/devel/ruby-red-colors/PLIST
index 1523f802ae12..51a2f8531518 100644
--- a/devel/ruby-red-colors/PLIST
+++ b/devel/ruby-red-colors/PLIST
@@ -1,4 +1,4 @@
-@comment $NetBSD: PLIST,v 1.4 2021/08/22 13:55:46 taca Exp $
+@comment $NetBSD: PLIST,v 1.5 2024/02/19 15:07:09 taca Exp $
 ${GEM_HOME}/cache/${GEM_NAME}.gem
 ${GEM_LIBDIR}/.yardopts
 ${GEM_LIBDIR}/Gemfile
@@ -23,6 +23,7 @@ ${GEM_LIBDIR}/data/colormaps/turbo.json
 ${GEM_LIBDIR}/data/colormaps/twilight.json
 ${GEM_LIBDIR}/data/colormaps/viridis.json
 ${GEM_LIBDIR}/data/colormaps/vlag.json
+${GEM_LIBDIR}/doc/text/news.md
 ${GEM_LIBDIR}/lib/colors.rb
 ${GEM_LIBDIR}/lib/colors/abstract_color.rb
 ${GEM_LIBDIR}/lib/colors/alpha_component.rb
@@ -33,6 +34,7 @@ ${GEM_LIBDIR}/lib/colors/colormap_data/matplotlib_builtin.rb
 ${GEM_LIBDIR}/lib/colors/colormap_data/seaborn_builtin.rb
 ${GEM_LIBDIR}/lib/colors/colormap_registry.rb
 ${GEM_LIBDIR}/lib/colors/convert.rb
+${GEM_LIBDIR}/lib/colors/css.rb
 ${GEM_LIBDIR}/lib/colors/helper.rb
 ${GEM_LIBDIR}/lib/colors/hsl.rb
 ${GEM_LIBDIR}/lib/colors/hsla.rb
@@ -50,6 +52,7 @@ ${GEM_LIBDIR}/lib/colors/xyz.rb
 ${GEM_LIBDIR}/red-colors.gemspec
 ${GEM_LIBDIR}/test/helper.rb
 ${GEM_LIBDIR}/test/run.rb
+${GEM_LIBDIR}/test/test-css.rb
 ${GEM_LIBDIR}/test/test-hsl.rb
 ${GEM_LIBDIR}/test/test-hsla.rb
 ${GEM_LIBDIR}/test/test-husl.rb
diff --git a/devel/ruby-red-colors/distinfo b/devel/ruby-red-colors/distinfo
index c1aa09d7b111..c0c31bae28c5 100644
--- a/devel/ruby-red-colors/distinfo
+++ b/devel/ruby-red-colors/distinfo
@@ -1,5 +1,5 @@
-$NetBSD: distinfo,v 1.6 2021/10/26 10:19:43 nia Exp $
+$NetBSD: distinfo,v 1.7 2024/02/19 15:07:09 taca Exp $
 
-BLAKE2s (red-colors-0.3.0.gem) = d475b45113cb5ad4a535fef9082e269c4b34af87e7afc6c9209b931b8ad50574
-SHA512 (red-colors-0.3.0.gem) = baa05634213a46da968a42e478db097c5bc47187e61807a3b3c30b8109a0fae63d587e5a3227b5bca75b921304b9d5e24a5ba945361dd5eba1c25235889c2cf1
-Size (red-colors-0.3.0.gem) = 104448 bytes
+BLAKE2s (red-colors-0.4.0.gem) = 1168fe5f7661403977788ae8a6a1be6bd4f738804d5f3dc6f0e2c17bf4f9839e
+SHA512 (red-colors-0.4.0.gem) = ce142c8f0b0e0a3d676b8460938c788595d15a84f268ac80a70543f81d4042d60f6f5703c91a496be8d27eed504207525bd3c4b72909b3dfc1ea2599515aafe8
+Size (red-colors-0.4.0.gem) = 107008 bytes