What are the limitations of FPDF in terms of color support?

FPDF has limitations in terms of color support as it only supports a limited range of colors, specifically RGB colors. This means that more advanced color modes like CMYK or spot colors are not supported. To work around this limitation, you can convert your desired color to the closest RGB equivalent before using it in FPDF. 

// Function to convert CMYK color to RGB color
function cmyk_to_rgb($c, $m, $y, $k) {
    $r = 255 * (1 - $c) * (1 - $k);
    $g = 255 * (1 - $m) * (1 - $k);
    $b = 255 * (1 - $y) * (1 - $k);
    
    return array($r, $g, $b);
}

// Example of converting a CMYK color to RGB
list($c, $m, $y, $k) = array(0.2, 0.5, 0.8, 0.1);
list($r, $g, $b) = cmyk_to_rgb($c, $m, $y, $k);

// Now you can use $r, $g, $b as RGB values in FPDF

Keywords

FPDF limitations color support PHP library

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