Pixel Inspector
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Click or drag the graphic to get the red, green, and blue (RGB) intensities, the luminance value, and the nearest HTML color name of any pixel in an image. The luminance is given by the weighted sum of the intensities: .
Contributed by: Erik Mahieu (March 2011)
Open content licensed under CC BY-NC-SA
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"Pixel Inspector"
http://demonstrations.wolfram.com/PixelInspector/
Wolfram Demonstrations Project
Published: March 22 2011