I have created a safari extension with tool button icon of 64x64 pixels. its not as crisp as the safari buttons. I have tried higher resolutions and lower resolutions which are rendered worse than 64x64 size.
In below image notice how my custom tab switch icon on the left differ with the safari's on the right.
the difference is much clearer on an low res external monitor
How to make crispier and darker images like that of the default safari buttons?