AndroidColorX Library
· AndroidColorX (i.e: Android Color Extensions) is an Android library written in Kotlin that provides color utilities as extension functions.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window androidcolorx-0.2.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.