diff --git a/src/logic/utils/graph-utils.ts b/src/logic/utils/graph-utils.ts
index 9ce1eaa..46d767c 100644
--- a/src/logic/utils/graph-utils.ts
+++ b/src/logic/utils/graph-utils.ts
@@ -22,22 +22,22 @@ export default class GraphUtils
     /**
      * Get mark areas for percentage scores
      */
-    static getGradeMarkAreas()
+    static getGradeMarkAreas(opacity: number)
     {
         return {
             silent: true,
             data:
             [
                 // Above 100
-                [{itemStyle: {color: 'rgba(230,253,255,0.09)'}, yAxis: 120}, {yAxis: 100}],
+                [{itemStyle: {color: 'rgba(230,253,255)', opacity: opacity}, yAxis: 120}, {yAxis: 100}],
                 // 90 to 100
-                [{itemStyle: {color: 'rgba(241,255,237,0.09)'}, yAxis: 100}, {yAxis: 90}],
+                [{itemStyle: {color: 'rgba(241,255,237)', opacity: opacity}, yAxis: 100}, {yAxis: 90}],
                 // 80 to 90
-                [{itemStyle: {color: 'rgba(255,250,216,0.09)'}, yAxis: 90}, {yAxis: 80}],
+                [{itemStyle: {color: 'rgba(255,250,216)', opacity: opacity}, yAxis: 90}, {yAxis: 80}],
                 // 70 to 80
-                [{itemStyle: {color: 'rgba(255,225,199,0.1)'}, yAxis: 80}, {yAxis: 70}],
+                [{itemStyle: {color: 'rgba(255,225,199)', opacity: opacity}, yAxis: 80}, {yAxis: 70}],
                 // Below 70 (Fail)
-                [{itemStyle: {color: 'rgb(255,190,184, 0.09)'}, yAxis: 70}, {yAxis: -100}]
+                [{itemStyle: {color: 'rgb(255,190,184)', opacity: opacity}, yAxis: 70}, {yAxis: -100}]
             ]
         }
     }
diff --git a/src/pages/overall/overall-line/overall-line.ts b/src/pages/overall/overall-line/overall-line.ts
index f7eda4e..0194b8b 100644
--- a/src/pages/overall/overall-line/overall-line.ts
+++ b/src/pages/overall/overall-line/overall-line.ts
@@ -43,7 +43,7 @@ export default class OverallLine extends Vue
         {
             smooth: true,
             markLine: GraphUtils.getTermLines(),
-            markArea: GraphUtils.getGradeMarkAreas()
+            markArea: GraphUtils.getGradeMarkAreas(0.09)
         },
         xAxis:
         {