On Sun, Mar 22, 2015 at 3:31 PM, kilon alios <[email protected]> wrote:

> Color white - (Color white alpha:1.0) = Color black.
> again reasonable


No, it's not really reasonable ;)

> (Color white alpha: 1.0) = Color white => true


I personally assume to get Color transparent when subtract two absolutely
equal colors.
And by the way there is no way in pharo to detect that they could be not
equal:

 (Color white alpha: 1.0) != Color white

Color white - (Color white alpha:1.0)

The same as

> Color white - Color white



Cheers,
Alex

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