RFR: 8325445: [macOS] Colors are not displayed in sRGB color space [v3]

[Martin Fox]

On Thu, 1 Aug 2024 18:02:05 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

>> I'm not sure this test needs to be that precise. And I'm fine with the threshold falling below 2.0/255.0 since it should be as small as possible (I even experimented briefly with lower numbers). I haven't run into an issue on the three platforms I've run this test on.
>
> Then the comment might not be technically correct, because it is possible to have "two bit difference" in the integer color values, yet fail due to small error intrinsic in floating point operations.
> 
> Example:
> 
> a=253 b=251 delta=0.007843137254902044 tol=0.00784313725490196
> 
> delta=0.007843137254902044
>   tol=0.00784313725490196  (2.0 / 255.0)

I've updated the constant as you suggested.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1473#discussion_r1700739626