diff --git a/README.md b/README.md
index 689c29e..b353b8d 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ sudo dnf install fcitx5-devel extra-cmake-modules cairo-devel pango-devel \
 然后:
 
 ```
-scripts/build.sh      # 下载 Fcitx5 和 yoga 源码,叠加 src/,构建 m3ui
+scripts/build.sh      # 下载 Fcitx5、yoga 和 libmonet 源码,叠加 src/,构建 m3ui
 scripts/install.sh    # 安装到 ~/.local,不改动 $HOME 以外的任何东西
 ```
 
@@ -56,6 +56,12 @@ scripts/install.sh    # 安装到 ~/.local,不改动 $HOME 以外的任何东西
 没有固定提交的版本会被拒绝,除非你自己用 `FCITX_COMMIT=<sha>` 指定。这个插件跑在输入法进程里,
 看得到你打的所有字,所以构建来源值得认真对待。
 
+## 莫奈取色
+
+候选窗的颜色由 [libmonet](https://git.oeo.one/justme/libmonet) 从桌面强调色生成(`UseMonet=True`,默认开),
+深浅色跟随系统。输入法进程内不会启动任何子进程:直接复用 Fcitx5 自己监听的 XDG portal
+(KDE Plasma 6、GNOME 47+ 都有),取不到时回退到默认的粉色。`UseMonet=False` 回到主题文件里的固定颜色。
+
 ## 使用
 
 手动试用:
diff --git a/scripts/build.sh b/scripts/build.sh
index 7059fb7..35ec485 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -27,6 +27,8 @@ commit=${FCITX_COMMIT:-${known_commits[$version]:-}}
 [ -n "$commit" ] || die "no pinned commit for Fcitx5 $version. Look up the commit of its tag and pass it as FCITX_COMMIT=<sha>"
 # Commit of the yoga submodule pinned by Fcitx5 (third_party/yoga).
 yoga_commit=${YOGA_COMMIT:-042f5013152eb81c1552dec945b88f7b95ca350f}
+# libmonet (header-only) supplies the colours derived from the desktop accent.
+monet_commit=${MONET_COMMIT:-b97a55ac75ae82435628dc585cccadb45e4d2feb}
 
 # fetch_commit <url> <dir> <commit>, leaves <dir> checked out at exactly <commit>
 fetch_commit() {
@@ -48,6 +50,8 @@ echo ">> fetching Fcitx5 $version ($commit)"
 fetch_commit https://github.com/fcitx/fcitx5 "$srcdir" "$commit"
 echo ">> fetching yoga ($yoga_commit)"
 fetch_commit https://github.com/facebook/yoga "$srcdir/third_party/yoga" "$yoga_commit"
+echo ">> fetching libmonet ($monet_commit)"
+fetch_commit https://git.oeo.one/justme/libmonet.git "$work/libmonet" "$monet_commit"
 [ -z "${FETCH_ONLY:-}" ] || { echo ">> sources are in place"; exit 0; }
 
 echo ">> overlaying m3ui"
@@ -61,6 +65,7 @@ fi
 echo ">> configuring"
 cmake -S "$srcdir" -B "$work/cmake" -G Ninja \
     -DCMAKE_BUILD_TYPE=Release \
+    -DMONET_INCLUDE_DIR="$work/libmonet/include" \
     -DCMAKE_INSTALL_PREFIX="${PREFIX:-$HOME/.local/m3ui}" \
     -DENABLE_X11=On -DENABLE_WAYLAND=On \
     -DENABLE_TEST=Off -DENABLE_TESTING_ADDONS=Off -DENABLE_ENCHANT=Off \