lib/src/main/java/com/shamanland/fab/FloatingActionButton.java
public void setColorStateList(ColorStateList colorStateList) {
        boolean changed = mColorStateList != colorStateList;

        mColorStateList = colorStateList;

        if (changed) {
            updateBackground();
        }
    }
public void setColorStateList(ColorStateList colorStateList) {
        boolean changed = mColorStateList != colorStateList;

        mColorStateList = colorStateList;

        if (changed) {
            updateBackground();
        }
    }
Sets color state list as background for this button.
<p/>
Xml attribute: {@code app:floatingActionButtonColor}

@param colorStateList color