Hover on the main banner

i want to reduce the light on the main banner . so it become dark . and when i put the mouse on it . its light back to normal . like here
www.giants-anime.com

Hello @DareDev1l,

Add the following rule to your stylesheet.
Administration Panel > Display > Colors > CSS stylesheet

Code:

#logo img { opacity:0.7; transition:300ms }
#logo img:hover { opacity:1 }