public static boolean isColorKey(String key) {
		return StringUtils.startsWithAny(key, COLOR_ID_PREFIX, EXTERNAL_PREFIX,
			EXTERNAL_LAF_ID_PREFIX);
	}
Returns true if the given key string is a valid external key for a color value
@param key the key string to test
@return true if the given key string is a valid external key for a color value
Ghidra/Framework/Gui/src/main/java/generic/theme/ColorValue.java