diff --git a/README.md b/README.md
index 661ab2f..cd74f54 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,7 @@ Create `~/.vim/after/syntax/html.vim` and write these line:
     " syn include @htmlCss syntax/css/css3-mediaqueries.vim
     syn include @htmlCss syntax/css/css3-multicol.vim
     syn include @htmlCss syntax/css/css3-preslev.vim
+    syn include @htmlCss syntax/css/css3-regions.vim
     syn include @htmlCss syntax/css/css3-ruby.vim
     syn include @htmlCss syntax/css/css3-selectors.vim
     syn include @htmlCss syntax/css/css3-text.vim
@@ -76,6 +77,7 @@ Create `~/.vim/after/syntax/scss.vim` and write these lines:
     " runtime! syntax/css/css3-mediaqueries.vim
     runtime! syntax/css/css3-multicol.vim
     runtime! syntax/css/css3-preslev.vim
+    runtime! syntax/css/css3-regions.vim
     runtime! syntax/css/css3-ruby.vim
     runtime! syntax/css/css3-selectors.vim
     runtime! syntax/css/css3-text.vim
@@ -103,6 +105,7 @@ HISTORY
 
 ### WIP
 
+  * Add CSS Regions Module Level 3 features
   * Add CSS Exclusions and Shapes Module Level 3 features
   * Add CSS Grid Layout features
   * Add CSS Box Alignment features
diff --git a/after/syntax/css/css3-break.vim b/after/syntax/css/css3-break.vim
index dfbf42a..f8997d8 100644
--- a/after/syntax/css/css3-break.vim
+++ b/after/syntax/css/css3-break.vim
@@ -1,3 +1,2 @@
 " TODO: create cssBreakProp group and cssBreakAttr group
 syn match cssFontProp contained "\<break-\(after\|before\|inside\)\>"
-syn match cssFontAttr contained "\<\(avoid-\)\=region\>"
diff --git a/after/syntax/css/css3-regions.vim b/after/syntax/css/css3-regions.vim
new file mode 100644
index 0000000..f7dddcd
--- /dev/null
+++ b/after/syntax/css/css3-regions.vim
@@ -0,0 +1,6 @@
+" TODO: create cssRegionsProp group and cssRegionsAttr group
+syn match cssFontProp contained "\<flow-\(from\|into\)\>"
+syn match cssFontProp contained "\<region-overflow\>"
+syn keyword cssFontAttr contained break
+syn match cssFontAttr contained "\<\(avoid-\)\=region\>"
+syn match cssTagName "@region\>" nextgroup=cssDefinition