If we are using the tyop3 version 4.7 or less and the Image magic is upgraded to the latest version (>= 6.7.5)
then we need to set the colorspace to sRGB in install tool and need to patch the core file to make it work properly.

Find the file ‘class.t3lib_stdgraphic.php‘ in t3lib.
add the following lines in order

add
protected $IMversion = 0; // ImageMagick Version
after the line
var $nativeCharset = ”; // Is set to the native character set of the input strings.

in similar way

add
else {
$cmd = t3lib_div::imageMagickCommand(‘identify’,’-version | grep Version:’);
$ret = explode(‘ ‘,t3lib_utility_Command::exec($cmd));
$ret = explode(‘.’,str_replace(‘-‘,’.’,$ret[2]));
$this->IMversion = $ret[0].str_pad($ret[1],4,’0′,STR_PAD_LEFT).str_pad($ret[2],4,’0′,STR_PAD_LEFT).str_pad($ret[3],4,’0′,STR_PAD_LEFT);
}
after
if (!$gfxConf[‘im’]) {
$this->NO_IMAGE_MAGICK = 1;
}

Replace the line
$this->cmds[‘jpg’] = $this->cmds[‘jpeg’] = ‘-colorspace RGB -sharpen 50 -quality ‘ . $this->jpegQuality;
after
$this->jpegQuality = t3lib_utility_Math::forceIntegerInRange($gfxConf[‘jpg_quality’], 10, 100, 75);
with
$this->cmds[‘jpg’] = $this->cmds[‘jpeg’] = ‘-colorspace ‘ . ( $this->IMversion >= 6000700050005 ? ‘s’ : ” ) . ‘RGB -sharpen 50 -quality ‘ . $this->jpegQuality;

Replace the line
$this->cmds[‘jpg’] = $this->cmds[‘jpeg’] = ‘-colorspace RGB -quality ‘ . $this->jpegQuality;
after
$this->NO_IM_EFFECTS = 1;
with
$this->cmds[‘jpg’] = $this->cmds[‘jpeg’] = ‘-colorspace ‘ . ( $this->IMversion >= 6000700050005 ? ‘s’ : ” ) . ‘RGB -quality ‘ . $this->jpegQuality;
Replace the line
$this->cmds[‘jpg’] = $this->cmds[‘jpeg’] = ‘-colorspace RGB -quality ‘ . intval($gfxConf[‘jpg_quality’]) . $this->v5_sharpen(10);
after
$this->V5_EFFECTS = 1;
if ($gfxConf[‘im_v5effects’] > 0) {
with
$this->cmds[‘jpg’] = $this->cmds[‘jpeg’] = ‘-colorspace ‘ . ( $this->IMversion >= 6000700050005 ? ‘s’ : ” ) . ‘RGB -quality ‘ . intval($gfxConf[‘jpg_quality’]) . $this->v5_sharpen(10);

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