private static String fromExternalId(String externalId) {
		if (externalId.startsWith(EXTERNAL_PREFIX)) {
			return externalId.substring(EXTERNAL_PREFIX.length());
		}
		if (externalId.startsWith(EXTERNAL_LAF_ID_PREFIX)) {
			return LAF_ID_PREFIX + externalId.substring(EXTERNAL_LAF_ID_PREFIX.length());
		}
		return externalId;
	}
Parses the value string into a color or reference and creates a new ColorValue using
the given key and the parse results.
@param key the key to associate the parsed value with
@param value the color value to parse
@return a ColorValue with the given key and the parsed value
Ghidra/Framework/Gui/src/main/java/generic/theme/ColorValue.java