Convert rgb to hex in php

in my code i have

$color = rgb(255, 255, 255);

i want to convert this into hex color code.Out put like

$color = '#ffffff';

asked Oct 6, 2015 at 5:51

2

A simple sprintf will do.

$color = sprintf("#%02x%02x%02x", 13, 0, 255); // #0d00ff

To break down the format:

• # - the literal character #
• % - start of conversion specification
• 0 - character to be used for padding
• 2 - minimum number of characters the conversion should result in, padded with the above as necessary
• x - the argument is treated as an integer and presented as a hexadecimal number with lowercase letters
• %02x%02x - the above four repeated twice more

answered Oct 6, 2015 at 19:06

user3942918user3942918

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0

You can use following function

function fromRGB($R, $G, $B)
{

    $R = dechex($R);
    if (strlen($R)<2)
    $R = '0'.$R;

    $G = dechex($G);
    if (strlen($G)<2)
    $G = '0'.$G;

    $B = dechex($B);
    if (strlen($B)<2)
    $B = '0'.$B;

    return '#' . $R . $G . $B;
}

Then, echo fromRGB(115,25,190); will print #7319be

Source: RGB to hex colors and hex colors to RGB - PHP

answered Oct 6, 2015 at 5:58

SuyogSuyog

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0

You can try this simple piece of code below. You can pass the rgb code dynamically as well in the code.

$rgb = (123,222,132);
$rgbarr = explode(",",$rgb,3);
echo sprintf("#%02x%02x%02x", $rgbarr[0], $rgbarr[1], $rgbarr[2]);

This will code return like #7bde84

answered Nov 23, 2016 at 9:52

IAmMilinPatelIAmMilinPatel

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3

Here is a function that will accept the string version of either an rgb or rgba and return the hex color.

    function rgb_to_hex( string $rgba ) : string {
        if ( strpos( $rgba, '#' ) === 0 ) {
            return $rgba;
        }

        preg_match( '/^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?/i', $rgba, $by_color );

        return sprintf( '#%02x%02x%02x', $by_color[1], $by_color[2], $by_color[3] );
    }

Example: rgb_to_hex( 'rgba(203, 86, 153, 0.8)' ); // Returns #cb5699

answered Nov 13, 2019 at 15:36

Mat LipeMat Lipe

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0

You can try this

function rgb2html($r, $g=-1, $b=-1)
{
    if (is_array($r) && sizeof($r) == 3)
        list($r, $g, $b) = $r;

    $r = intval($r); $g = intval($g);
    $b = intval($b);

    $r = dechex($r<0?0:($r>255?255:$r));
    $g = dechex($g<0?0:($g>255?255:$g));
    $b = dechex($b<0?0:($b>255?255:$b));

    $color = (strlen($r) < 2?'0':'').$r;
    $color .= (strlen($g) < 2?'0':'').$g;
    $color .= (strlen($b) < 2?'0':'').$b;
    return '#'.$color;
}

answered Oct 6, 2015 at 5:56

Rajarshi DasRajarshi Das

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In case you want to use external solutions, spatie has a package for doing exacly what you want:

https://github.com/spatie/color

$rgb = Rgb::fromString('rgb(55,155,255)');

echo $rgb->red(); // 55
echo $rgb->green(); // 155
echo $rgb->blue(); // 255

echo $rgb; // rgb(55,155,255)

$rgba = $rgb->toRgba(); // `Spatie\Color\Rgba`
$rgba->alpha(); // 1
echo $rgba; // rgba(55,155,255,1)

$hex = $rgb->toHex(); // `Spatie\Color\Hex`
echo $hex; // #379bff

$hsl = $rgb->toHsl();
echo $hsl; // hsl(210,100%,100%)

answered Feb 22, 2021 at 15:41

Ostap BrehinOstap Brehin

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