Fix typo in README.md

Author: BIGGASSS

README.md

@@ -4,7 +4,7 @@ A Minecraft Fabric mod that displays the current playing song in Netease Music o
 
 ## Available Commands
 
-- `/nmd color <hex|name>` - Set color (e.g., `#FF5733`, `red`, `yellow`)
+- `/nmd color <hex|name>` - Set color (e.g., `FF5733`, `red`, `yellow`)
 - `/nmd pos <x> <y>` - Set position (use `-1` for X to auto right-align)
 - `/nmd width <50-500>` - Set max box width
 - `/nmd scale <0.5-3.0>` - Set text scale