From 8daf965788a6739de09af68e9b4f88b85027e6e9 Mon Sep 17 00:00:00 2001
From: 7w1 <noreply@sl.sable.moe>
Date: Thu, 28 May 2026 16:37:02 -0500
Subject: [PATCH 1/2] fix math inside of color blocks

---
 src/app/plugins/markdown/extensions/matrix-math.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/app/plugins/markdown/extensions/matrix-math.ts b/src/app/plugins/markdown/extensions/matrix-math.ts
index 21265f70f..26248a0b8 100644
--- a/src/app/plugins/markdown/extensions/matrix-math.ts
+++ b/src/app/plugins/markdown/extensions/matrix-math.ts
@@ -221,12 +221,18 @@ function isIgnorableMathContent(latex: string): boolean {
  * - the closing `$` is not preceded by whitespace, and
  * - the closing `$` is not immediately followed by an ASCII digit.
  */
+/** Opening `$[fg.color=…]` / `$[bg.color=…]` */
+const MFM_COLOR_FN_OPEN = /^\$\[(?:fg|bg)\.color=/;
+
 function tryTokenizeInlineMath(
   src: string
 ): { type: 'math'; raw: string; latex: string } | undefined {
   if (!src.startsWith('$')) {
     return undefined;
   }
+  if (MFM_COLOR_FN_OPEN.test(src)) {
+    return undefined;
+  }
   if (src.startsWith('$$') && (src.length < 3 || src.charAt(2) !== '$')) {
     return undefined;
   }
@@ -256,7 +262,7 @@ export const matrixMathExtension = {
   name: 'math',
   level: 'inline',
   start(src: string) {
-    if (/^\$\[(?:fg|bg)\.color=/.test(src)) return -1;
+    if (MFM_COLOR_FN_OPEN.test(src)) return -1;
     return src.indexOf('$');
   },
   tokenizer(src: string) {

From b706cb9ed3f00a6ee8715846c5d7b56f1a481216 Mon Sep 17 00:00:00 2001
From: 7w1 <noreply@sl.sable.moe>
Date: Thu, 28 May 2026 17:41:06 -0500
Subject: [PATCH 2/2] changeset

---
 .changeset/fix-math-in-color.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/fix-math-in-color.md

diff --git a/.changeset/fix-math-in-color.md b/.changeset/fix-math-in-color.md
new file mode 100644
index 000000000..cb09b6eeb
--- /dev/null
+++ b/.changeset/fix-math-in-color.md
@@ -0,0 +1,5 @@
+---
+default: patch
+---
+
+Fix math parsing inside of color blocks not being parsed properly.