@Override
    public String toString() {
        return this.value;
    }
Specify the color of the shadow cast by the captions. Leave Shadow color blank and set Style passthrough to enabled
to use the shadow color data from your input captions, if present. Within your job settings, all of your DVB-Sub
settings must be identical.
aws-java-sdk-mediaconvert/src/main/java/com/amazonaws/services/mediaconvert/model/DvbSubtitleShadowColor.java