Functional confidence interval shadow, but looks awful

src/main/java/com/application/DB/Constants.java

...main/java/com/application/GUI/LineChartFunctionality.java

src/main/java/com/application/Main.java

src/main/resources/com.application/GUI/graphStyles.css

target/classes/com.application/GUI/graphStyles.css

.../classes/com/application/GUI/LineChartFunctionality.class

target/classes/com/application/Main.class