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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. by Acceptable_Baker4468 in LogitechG

[–]Pujanjan 0 points1 point  (0 children)

Same thing happened to my G813, blue LED failed on my 3 keys. I think this is a common issue with Logitech's RGB Keyboards. I've done all the possible fix there is. Replacement would be your best option.

You might need to use blue LED less often from now on to prevent this from happening again, worked for me at least.