changed filter for portrait

assets/css/custom.css

@@ -20,7 +20,6 @@ body {
 	flex-flow: column;
 	height: 100%;
 	background-color: black;
-
 }
 
 img {
@@ -47,9 +46,8 @@ img {
 	background-size: contain;
 	background-repeat: no-repeat;
 	background-image: url({{site.baseurl}}/assets/images/yui.png);
-    filter: hue-rotate(-100deg);
+	filter: brightness(80%);
 	background-position: center right;
-
 }
 
 /* header */
@@ -71,7 +69,6 @@ nav {
 	line-height: 2rem;
 	padding-left: 20px;
 	padding-right: 20px;
-
 }
 
 nav a {
@@ -97,7 +94,6 @@ main.post-list {
 	line-height: 1.5rem;
 	padding-left: 20px;
 	padding-right: 20px;
-
 }
 
 main.about{
@@ -159,7 +155,6 @@ footer {
 	padding-top:20px;
 	padding-left: 20px;
 	padding-right: 20px;
-
 }
 
 @media screen and (max-width: 780px) {