diff --git a/templates/repo/diff/blob_excerpt.tmpl b/templates/repo/diff/blob_excerpt.tmpl
index 8312b5d913..a80abe263f 100644
--- a/templates/repo/diff/blob_excerpt.tmpl
+++ b/templates/repo/diff/blob_excerpt.tmpl
@@ -1,6 +1,6 @@
 {{if $.IsSplitStyle}}
 	{{range $k, $line := $.section.Lines}}
-	<tr class="{{.GetHTMLDiffLineType}}-code nl-{{$k}} ol-{{$k}}">
+	<tr class="{{.GetHTMLDiffLineType}}-code nl-{{$k}} ol-{{$k}} line-expanded">
 		{{if eq .GetType 4}}
 			<td class="lines-num lines-num-old" data-line-num="{{if $line.LeftIdx}}{{$line.LeftIdx}}{{end}}">
 				<div class="tw-flex">
@@ -26,17 +26,17 @@
 		{{else}}
 			{{$inlineDiff := $.section.GetComputedInlineDiffFor $line ctx.Locale}}
 			<td class="lines-num lines-num-old" data-line-num="{{if $line.LeftIdx}}{{$line.LeftIdx}}{{end}}"><span rel="{{if $line.LeftIdx}}diff-{{$.FileNameHash}}L{{$line.LeftIdx}}{{end}}"></span></td>
-			<td class="blob-excerpt lines-escape lines-escape-old">{{if and $line.LeftIdx $inlineDiff.EscapeStatus.Escaped}}<button class="toggle-escape-button btn interact-bg" title="{{template "repo/diff/escape_title" dict "diff" $inlineDiff}}"></button>{{end}}</td>
-			<td class="blob-excerpt lines-type-marker lines-type-marker-old">{{if $line.LeftIdx}}<span class="tw-font-mono" data-type-marker=""></span>{{end}}</td>
-			<td class="blob-excerpt lines-code lines-code-old">{{/*
+			<td class="lines-escape lines-escape-old">{{if and $line.LeftIdx $inlineDiff.EscapeStatus.Escaped}}<button class="toggle-escape-button btn interact-bg" title="{{template "repo/diff/escape_title" dict "diff" $inlineDiff}}"></button>{{end}}</td>
+			<td class="lines-type-marker lines-type-marker-old">{{if $line.LeftIdx}}<span class="tw-font-mono" data-type-marker=""></span>{{end}}</td>
+			<td class="lines-code lines-code-old">{{/*
 				*/}}{{if $line.LeftIdx}}{{template "repo/diff/section_code" dict "diff" $inlineDiff}}{{else}}{{/*
 					*/}}<code class="code-inner"></code>{{/*
 				*/}}{{end}}{{/*
 			*/}}</td>
 			<td class="lines-num lines-num-new" data-line-num="{{if $line.RightIdx}}{{$line.RightIdx}}{{end}}"><span rel="{{if $line.RightIdx}}diff-{{$.FileNameHash}}R{{$line.RightIdx}}{{end}}"></span></td>
-			<td class="blob-excerpt lines-escape lines-escape-new">{{if and $line.RightIdx $inlineDiff.EscapeStatus.Escaped}}<button class="toggle-escape-button btn interact-bg" title="{{template "repo/diff/escape_title" dict "diff" $inlineDiff}}"></button>{{end}}</td>
-			<td class="blob-excerpt lines-type-marker lines-type-marker-new">{{if $line.RightIdx}}<span class="tw-font-mono" data-type-marker=""></span>{{end}}</td>
-			<td class="blob-excerpt lines-code lines-code-new">{{/*
+			<td class="lines-escape lines-escape-new">{{if and $line.RightIdx $inlineDiff.EscapeStatus.Escaped}}<button class="toggle-escape-button btn interact-bg" title="{{template "repo/diff/escape_title" dict "diff" $inlineDiff}}"></button>{{end}}</td>
+			<td class="lines-type-marker lines-type-marker-new">{{if $line.RightIdx}}<span class="tw-font-mono" data-type-marker=""></span>{{end}}</td>
+			<td class="lines-code lines-code-new">{{/*
 				*/}}{{if $line.RightIdx}}{{template "repo/diff/section_code" dict "diff" $inlineDiff}}{{else}}{{/*
 					*/}}<code class="code-inner"></code>{{/*
 				*/}}{{end}}{{/*
@@ -46,7 +46,7 @@
 	{{end}}
 {{else}}
 	{{range $k, $line := $.section.Lines}}
-	<tr class="{{.GetHTMLDiffLineType}}-code nl-{{$k}} ol-{{$k}}">
+	<tr class="{{.GetHTMLDiffLineType}}-code nl-{{$k}} ol-{{$k}} line-expanded">
 		{{if eq .GetType 4}}
 			<td colspan="2" class="lines-num">
 				<div class="tw-flex">
@@ -72,9 +72,9 @@
 			<td class="lines-num lines-num-new" data-line-num="{{if $line.RightIdx}}{{$line.RightIdx}}{{end}}"><span rel="{{if $line.RightIdx}}diff-{{$.FileNameHash}}R{{$line.RightIdx}}{{end}}"></span></td>
 		{{end}}
 		{{$inlineDiff := $.section.GetComputedInlineDiffFor $line ctx.Locale}}
-		<td class="blob-excerpt lines-escape">{{if $inlineDiff.EscapeStatus.Escaped}}<button class="toggle-escape-button btn interact-bg" title="{{template "repo/diff/escape_title" dict "diff" $inlineDiff}}"></button>{{end}}</td>
-		<td class="blob-excerpt lines-type-marker"><span class="tw-font-mono" data-type-marker="{{$line.GetLineTypeMarker}}"></span></td>
-		<td class="blob-excerpt lines-code{{if (not $line.RightIdx)}} lines-code-old{{end}}"><code {{if $inlineDiff.EscapeStatus.Escaped}}class="code-inner has-escaped" title="{{template "repo/diff/escape_title" dict "diff" $inlineDiff}}"{{else}}class="code-inner"{{end}}>{{$inlineDiff.Content}}</code></td>
+		<td class="lines-escape">{{if $inlineDiff.EscapeStatus.Escaped}}<button class="toggle-escape-button btn interact-bg" title="{{template "repo/diff/escape_title" dict "diff" $inlineDiff}}"></button>{{end}}</td>
+		<td class="lines-type-marker"><span class="tw-font-mono" data-type-marker="{{$line.GetLineTypeMarker}}"></span></td>
+		<td class="lines-code{{if (not $line.RightIdx)}} lines-code-old{{end}}"><code {{if $inlineDiff.EscapeStatus.Escaped}}class="code-inner has-escaped" title="{{template "repo/diff/escape_title" dict "diff" $inlineDiff}}"{{else}}class="code-inner"{{end}}>{{$inlineDiff.Content}}</code></td>
 	</tr>
 	{{end}}
 {{end}}
diff --git a/web_src/css/repo.css b/web_src/css/repo.css
index 62a72abaf9..4de994112f 100644
--- a/web_src/css/repo.css
+++ b/web_src/css/repo.css
@@ -2377,7 +2377,7 @@ tbody.commit-list {
 
 .tag-code,
 .tag-code td,
-.tag-code .blob-excerpt {
+.tag-code.line-expanded {
   background-color: var(--color-box-body-highlight);
   vertical-align: middle;
 }
@@ -2393,8 +2393,8 @@ tbody.commit-list {
   padding-top: 0 !important;
 }
 
-.blob-excerpt {
-  background-color: var(--color-secondary-alpha-30);
+.line-expanded {
+  background-color: var(--color-secondary-alpha-20);
 }
 
 .issue-keyword {
@@ -2553,11 +2553,9 @@ tbody.commit-list {
 
 .code-diff-unified .add-code,
 .code-diff-unified .add-code td,
-.code-diff-split .add-code .lines-num-new,
 .code-diff-split .add-code .lines-type-marker-new,
 .code-diff-split .add-code .lines-escape-new,
 .code-diff-split .add-code .lines-code-new,
-.code-diff-split .del-code .add-code.lines-num-new,
 .code-diff-split .del-code .add-code.lines-type-marker-new,
 .code-diff-split .del-code .add-code.lines-escape-new,
 .code-diff-split .del-code .add-code.lines-code-new {
@@ -2565,17 +2563,33 @@ tbody.commit-list {
   border-color: var(--color-diff-added-row-border);
 }
 
-.code-diff-split .del-code .lines-num-new,
 .code-diff-split .del-code .lines-type-marker-new,
 .code-diff-split .del-code .lines-code-new,
 .code-diff-split .del-code .lines-escape-new,
-.code-diff-split .add-code .lines-num-old,
 .code-diff-split .add-code .lines-escape-old,
 .code-diff-split .add-code .lines-type-marker-old,
 .code-diff-split .add-code .lines-code-old {
   background: var(--color-diff-inactive);
 }
 
+.code-diff-split .add-code .lines-num.lines-num-old,
+.code-diff-split .del-code .lines-num.lines-num-new {
+  background: var(--color-diff-inactive);
+}
+
+.code-diff-unified .del-code .lines-num,
+.code-diff-split .del-code .lines-num {
+  background: var(--color-diff-removed-linenum-bg);
+  color: var(--color-text);
+}
+
+.code-diff-unified .add-code .lines-num,
+.code-diff-split .add-code .lines-num,
+.code-diff-split .del-code .add-code.lines-num {
+  background: var(--color-diff-added-linenum-bg);
+  color: var(--color-text);
+}
+
 .code-diff-split tbody tr td:nth-child(5),
 .code-diff-split tbody tr td.add-comment-right {
   border-left: 1px solid var(--color-secondary);
diff --git a/web_src/css/themes/theme-gitea-dark-protanopia-deuteranopia.css b/web_src/css/themes/theme-gitea-dark-protanopia-deuteranopia.css
index 681aa3b539..c1a6edaf35 100644
--- a/web_src/css/themes/theme-gitea-dark-protanopia-deuteranopia.css
+++ b/web_src/css/themes/theme-gitea-dark-protanopia-deuteranopia.css
@@ -3,9 +3,10 @@
 /* red/green colorblind-friendly colors */
 /* from GitHub: --diffBlob-addition-*, --diffBlob-deletion-*, etc */
 :root {
-  --color-diff-added-word-bg: #388bfd66;
-  --color-diff-added-row-bg: #388bfd26;
-
-  --color-diff-removed-word-bg: #db6d2866;
-  --color-diff-removed-row-bg: #db6d2826;
+  --color-diff-added-linenum-bg: #1979fd46;
+  --color-diff-added-row-bg: #1979fd20;
+  --color-diff-added-word-bg: #1979fd66;
+  --color-diff-removed-linenum-bg: #c8622146;
+  --color-diff-removed-row-bg: #c8622120;
+  --color-diff-removed-word-bg: #c8622166;
 }
diff --git a/web_src/css/themes/theme-gitea-dark.css b/web_src/css/themes/theme-gitea-dark.css
index 7bf2c982c6..ad9ab5a8c2 100644
--- a/web_src/css/themes/theme-gitea-dark.css
+++ b/web_src/css/themes/theme-gitea-dark.css
@@ -143,14 +143,16 @@
   --color-grey-light: #818f9e;
   --color-gold: #b1983b;
   --color-white: #ffffff;
-  --color-diff-removed-word-bg: #6f3333;
-  --color-diff-added-word-bg: #3c653c;
-  --color-diff-removed-row-bg: #3c2626;
-  --color-diff-moved-row-bg: #818044;
-  --color-diff-added-row-bg: #283e2d;
-  --color-diff-removed-row-border: #634343;
-  --color-diff-moved-row-border: #bcca6f;
+  --color-diff-added-linenum-bg: #274227;
+  --color-diff-added-row-bg: #203224;
   --color-diff-added-row-border: #314a37;
+  --color-diff-added-word-bg: #3c653c;
+  --color-diff-moved-row-bg: #818044;
+  --color-diff-moved-row-border: #bcca6f;
+  --color-diff-removed-linenum-bg: #482121;
+  --color-diff-removed-row-bg: #301e1e;
+  --color-diff-removed-row-border: #634343;
+  --color-diff-removed-word-bg: #6f3333;
   --color-diff-inactive: #22282d;
   --color-error-border: #a04141;
   --color-error-bg: #522;
diff --git a/web_src/css/themes/theme-gitea-light-protanopia-deuteranopia.css b/web_src/css/themes/theme-gitea-light-protanopia-deuteranopia.css
index 7e03d90f5c..f42fa1db2c 100644
--- a/web_src/css/themes/theme-gitea-light-protanopia-deuteranopia.css
+++ b/web_src/css/themes/theme-gitea-light-protanopia-deuteranopia.css
@@ -3,9 +3,10 @@
 /* red/green colorblind-friendly colors */
 /* from GitHub: --diffBlob-addition-*, --diffBlob-deletion-*, etc */
 :root {
-  --color-diff-added-word-bg: #54aeff66;
+  --color-diff-added-linenum-bg: #54aeff4d;
   --color-diff-added-row-bg: #ddf4ff80;
-
-  --color-diff-removed-word-bg: #ffb77c80;
+  --color-diff-added-word-bg: #54aeff66;
+  --color-diff-removed-linenum-bg: #ffb77c4d;
   --color-diff-removed-row-bg: #fff1e580;
+  --color-diff-removed-word-bg: #ffb77c80;
 }
diff --git a/web_src/css/themes/theme-gitea-light.css b/web_src/css/themes/theme-gitea-light.css
index dfccd37647..8d4aa6df93 100644
--- a/web_src/css/themes/theme-gitea-light.css
+++ b/web_src/css/themes/theme-gitea-light.css
@@ -143,14 +143,16 @@
   --color-grey-light: #7c838a;
   --color-gold: #a1882b;
   --color-white: #ffffff;
-  --color-diff-removed-word-bg: #fdb8c0;
-  --color-diff-added-word-bg: #acf2bd;
-  --color-diff-removed-row-bg: #ffeef0;
-  --color-diff-moved-row-bg: #f1f8d1;
+  --color-diff-added-linenum-bg: #d1f8d9;
   --color-diff-added-row-bg: #e6ffed;
-  --color-diff-removed-row-border: #f1c0c0;
-  --color-diff-moved-row-border: #d0e27f;
   --color-diff-added-row-border: #e6ffed;
+  --color-diff-added-word-bg: #acf2bd;
+  --color-diff-moved-row-bg: #f1f8d1;
+  --color-diff-moved-row-border: #d0e27f;
+  --color-diff-removed-linenum-bg: #ffcecb;
+  --color-diff-removed-row-bg: #ffeef0;
+  --color-diff-removed-row-border: #f1c0c0;
+  --color-diff-removed-word-bg: #fdb8c0;
   --color-diff-inactive: #f0f2f4;
   --color-error-border: #e0b4b4;
   --color-error-bg: #fff6f6;