check length

.config/fish/functions/latex-color.fish

@@ -18,6 +18,12 @@ function latex-color --description "Get the LaTeX color from HEX code"
         set hex (string sub -s 2 $hex)
     end
 
+    # Check if the length of the hex is valid
+    if not contains $(string length $hex) $(string split " " "3 4 6 8")
+        echo "Error: Invalid HEX code"
+        return 1
+    end
+
     # Expand 3 hex to 4 hex
     if test (string length $hex) -eq 3
         set hex $(string join "" $hex 0)