color

Color Values. You can specify color values using either hexadecimal notation, a comma-separated list of component values, or decimals.

color	{{ gray[, alpha][g]}\| { red, green, blue[ , rgbAlpha][r]}\| { cyan, magenta, yellow, black[,alpha]k}\| {0x{hex2\|hex4}[g]}\| {[0x]{ hex6\| hex8}[r]}\| {[0x]{ hex8\| hex10}k}}[s]
red, green, blue, rgbAlpha	color component value (0...255, decimal int)
cyan, magenta, yellow, black, alpha	CMYK color component value (0..100 %, decimal int)
gray, alpha	gray color component value (0…100%, decimal int)
hex2	packed two-digit hex gray color value (GG)
hex4	packed four digit hex gray with alpha color value (GGAA)
hex6	packed six-digit hexadecimal RGB color value (RRGGBB)
hex8	packed eight-digit hexadecimal RGBA (RRGGBBAA) or CMYK (CCMMYYKK) color value (if specified with 'k' suffix)
hex10	packed ten-digit hexadecimal CMYK with alpha value (CCYYMMKKAA)

Decimal component values for RGB colors are in the range 0…255. Decimal component values for CMYK and gray are in the range 0…100%. All hexadecimal component values are in the range 0…0xFF.

Color component values are assumed to be independent of the alpha value (not pre-multiplied).

All color values, prefixes, and suffixes are not case-sensitive.

The type suffix ‘k’ is required for CMYK color values. A type suffix can be optionally specified for RGB and gray color values.

The prefix ‘0x’ is required for hexadecimal gray color values.

The ‘s’ suffix specifies that the color value is associated with the input (source) color space corresponding to the pixel type of the color value (defined with attribute::IccProfileSrc*). If this suffix is not present, the color value is associated with the output (destination) color space (defined with icc= or attribute::IccProfile*).

Default

If an alpha value is not specified explicitly it is assumed to be 255, 0xFF, or 100% (fully opaque).

Examples

Some examples of valid color specifiers, and their corresponding pixel type, color value, alpha value, and default color space:

*color*	Pixel Type	Color Value	Alpha Value	Default Color Space
0,100,200	RGB	0,100,200	255	IccProfileRgb
0,100,200,200rs	RGB	0,100,200	200	IccProfileSrcRgb
0x010203S	RGB	1,2,3	255	IccProfileSrcRgb
a0b1c2d3R	RGB	160,177,194	211	IccProfileRgb
100S	gray	100%	100%	IccProfileSrcGray
50,75g	gray	50%	75%	IccProfileGray
0X70G	gray	44%	44%	IccProfileGray
0xddeegs	gray	87%	93%	IccProfileSrcGray
94,11,50,33k	CMYK	94-11-50-33%	100%	IccProfileCmyk
22,23,24,25,26KS	CMYK	22-23-24-25%	26%	IccProfileSrcCmyk
38393A3bK	CMYK	56-57-58-59%	100%	IccProfileCmyk
0x0a0b0C0d0eks	CMYK	10-11-12-13%	14%	IccProfileSrcCmyk

The output color space specified with icc= applies instead of the default color space when the pixel type of an output color corresponds to the pixel type of the output image.