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Choosing "User Specified Color" results in grey

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Nibble

Computer
Mar 4, 2011
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Hello,

for a video processing program, I want to record a signal from a webcam and a microphone and enlarge the video screen with an image pad to have extra space for volume bars.
For now, the audio input is realised by a pseudo random number generator.

However, when I want to specify the color of the image pad or the volume bar (for example [255 0 0] for red), they appear grey.
If you run the model (a webcam is needed), you will see, that the black frame of the bar is partially covered by the grey bar, which cannot be seen on the grey background of the image pad.

Does anyone have an idea, what causes this effect or how the problem can be solved?
 
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