So i am trying to edit an icon pack that has an index lock on it.

I know to unlock it you go to image>mode>rgb color.

However doing this drastically reduces the image quality.

![Below is the original still with the index layer:][1]

[1]: https://i.sstatic.net/Hc20U.png

Apologies the icon above is white (on a white background)!

![Here it is unlocked and edited with loss of qaulity:][2]

[2]: https://i.sstatic.net/C9dzr.png

Any help appreciated.