How to add vibrancy to image?

Hi, How can I add vibrancy to image/NSButton for example my play button (macOS) I found a SwiftUI library for this but I don't use swift UI https://github.com/lucasbrown/swiftui-visual-effects

My app

Did you check Apple's doc:

https://developer.apple.com/documentation/appkit/nsvisualeffectview

There is this specific warning:

AppKit views and controls automatically add vibrancy where appropriate. For example, NSTextField enables vibrancy to increase the contrast between the text and background. Don't change the vibrancy settings of standard AppKit views and controls.

How to add vibrancy to image?
 
 
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