Sometimes there's even inconsistency across different features in the same app. This makes it very difficult to convert blur size from design to production, or when moving values between or within design tools. A blur of 50 pixels in one place may not be the same as a blur of 50 pixels somewhere else.
All the CSS box-shadows are essentially identical, likely due to the CSS specification including information on how to treat blur radius. There's subtle differences, but I'm going to consider them to be identical. The SVG feGaussianBlur examples are offset. I wonder if this is due to gamma or colourspace correction? I didn't get time to check.
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