If we check the RGB chart, we will see that there are in fact some colors that start with the letter Z. On the chart, we will find zenchua (a shade of pink), zokine (a shade of green), zoboba (a shade of brown), zomp (a shade of blue), zunza (a shade of gray), zunisha (a shade of blue), zutem (a shade of yellow), and zucchini (another shade of green).