Compare Apple RGB to sRGB
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The same RGB coordinates entered in Apple RGB (the default RGB space in older Macs) on the LEFT side (Space #1) and sRGB (Windows default RGB space, and Mac default space since OS X 10.4) on the RIGHT side (Space #2). You can see on the chromaticity diagram that the same RGB coordinates correspond to two different colors (i.e. they have different "xy" coordinates). In essence, the darker sRGB color patch shows how a color generated on a Mac a few years ago, will look on a recent Mac or in a Windows PC if it is not properly translated to the sRGB environment. A similar effect will be seen for all colors in legacy images generated in Apple RGB, which were most likely not tagged with an ICC profile. The CIE94 color difference is 5,51, a very noticeable difference. The difference is mostly intensity (DeltaL* = -5,25), followed by chroma (i.e. saturation; DeltaC* = 3,91), and some hue difference (DeltaH* = 2,21). The patch layout on the right of the main screen shows the two colors against a background of the other patch color, and against black, mid-gray, and white backgrounds. |
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