### Question:
ColorUtil { public static String colorTag(Color color) { return OPENING_COLOR_TAG_START + colorToHexCode(color) + OPENING_COLOR_TAG_END; }  static String colorTag(Color color); static String prependColorTag(final String str, final Color color); static String wrapWithColorTag(final String str, final Color color); static String toHexColor(final Color color); static Color colorLerp(final Color a, final Color b, final double t); static String colorToHexCode(final Color color); static String colorToAlphaHexCode(final Color color); static boolean isAlphaHex(String hex); static boolean isHex(String hex); static int constrainValue(int value); static Color fromString(String string); static Color fromHex(String hex); static Color fromObject(@Nonnull final Object object); static final int MAX_RGB_VALUE; static final int MIN_RGB_VALUE; }### Answer:
@Test public void colorTag() { COLOR_HEXSTRING_MAP.forEach((color, hex) -> { assertEquals("<col=" + hex + ">", ColorUtil.colorTag(color)); }); }