Transparency-Enabled Spectrum Color Picker for Color Selection

Inquiry:
I incorporated the Spectrum color picker on my website as I required a color picker with opacity, and I had a checkbox that worked fine with a basic color picker. However, I’m having trouble disabling it, even with the property.
Resolution 1:
My recommendation would be to utilize a color picker library such as Spectrum, which includes a range of color picker views and features. Furthermore, it is free of cost. You may obtain more information about it at https://bgrins.github.io/spectrum/.

Question:

For achieving a specific task, I make use of
Spectrum
, which is a jQuery plugin.

$('#backgroundColorPicker').spectrum({
    color: '#000',
    showAlpha: true,
    move: function(color){
        $('#result').css('background-color',color.toHexString());
    }
});

You can witness the execution of this code by visiting http://jsfiddle.net/UkmXM/1/.

Despite setting

showAlpha

to

true

for a transparent background, it doesn’t seem to work as expected.


Solution 1:

Transparency cannot be achieved using a hex string. Refer to

color.toRgbString()

at http://jsfiddle.net/UkmXM/2/ as an alternative.

$('#backgroundColorPicker').spectrum({
    color: '#000',
    showAlpha: true,
    move: function(color){
        $('#result').css('background-color',color.toRgbString());
    }
});


Solution 2:


The code snippet

toHex8String

was discovered in the TinyColor documentation.


Solution 3:


The toHex8String() function in the javascript library is currently returning an incorrect hex code for a semi-transparent white color. Instead of the expected #FFFFFF80, it is returning #80FFFFFF, which corresponds to a teal color. The function is prioritizing the alpha component of the RGBA over the RGB.

A potential solution has been proposed via this link: https://github.com/seballot/spectrum/issues/31. However, until it is implemented, you can obtain the transparent color by separately extracting the alpha value and adding it to the hexadecimal code.


color.toHexString() + pad2(convertDecimalToHex(color._a)

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