Color works fine, you set it to light blue and it is light blue
Your rule is below
#header-html { text-align:center;margin-top:2%; font-size: 200%; color: white; background-color: lightblue;; font-family: ‘Sansita’, sans-serif; }
Only error, but without consequences is that you have two semi colons after the background color, and you should only have one