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Truecolor

Truecolor is a method of representing and storing graphical image information that allows a very large number of colors, shades, and hues to be displayed in an image, such as in high quality photographic images or complex graphics. Truecolor defines 256 shades of red, green, and blue for each pixel of the digital picture, which ultimately results in 224 or 16,777,216 (approximately 16.7 million) color variations for each pixel. Truecolor RGB display mode does not need a color look-up table.[21]

The human eye is popularly believed to be capable of discriminating among as many as ten million colors.[22]
[edit] The 24-bit RGB representation

In the 24-bit RGB representation of the truecolor, color values for each pixel encoded in a 24 bits per pixel fashion in which three 8-bit unsigned integer (0 through 255) represent the intensities of red, green, and blue. This representation is the common color interchange format in image file formats such as BMP, JPEG, TGA or TIFF.

The following image shows the three "fully saturated" faces of a 24-bit per pixel RGB cube, unfolded into a plane:

* (0, 0, 0) is black
* (255, 255, 255) is white
* (255, 0, 0) is red
* (0, 255, 0) is green
* (0, 0, 255) is blue
* (255, 255, 0) is yellow
* (0, 255, 255) is cyan
* (255, 0, 255) is magenta

yellow
(255,255,0) green
(0,255,0) cyan
(0,255,255)
red
(255,0,0) RGBR.png blue
(0,0,255)
red
(255,0,0) magenta
(255,0,255)

The 256 levels of a primary usually do not represent equally spaced intensities, due to gamma correction.

This representation cannot offer the exact mid point 127.5, nor other non-integer values, as bytes do not hold fractional values, so these need to be rounded or truncated to a nearby integer value.[23] For example, Microsoft considers the color "medium gray"[24] to be the (128,128,128) RGB triplet in its default palette. The effect of such quantization (for every value, not only the midpoint) is usually not noticeable, but may build up in repeated editing operations or colorspace conversions.[25]

Typically, RGB for digital video is not full range. Instead, video RGB uses a convention with scaling and offsets such that (16, 16, 16) is black, (235, 235, 235) is white, etc. For example, these scalings and offsets are used for the digital RGB definition in the CCIR 601 standard.

chocolatepie33 wrote: @Arc: Did you look at the others, too? The third one is a color calculator.

@Everyone else: How do you make a transparent layer, like in making a guicursor translucent, to make a GUI? I have Microsoft Paint and Inkscape.