Logitech G512 CARBON LIGHTSYNC RGB Mechanical Gaming Keyboard (GX Blue Switch)

My keyboard have one key color is different from other, i tried to reinstall the g-hub application also same. The color still have but its the key that have wrong color. Take a look for the picture, the "8" button . It can be type but the color is different.

Logitech G713 Wired Gaming Keyboard with LIGHTSYNC RGB Lighting, Tactile Switches (GX Brown), and Keyboard Palm Rest, PC and Mac Compatible, White Mist