Firefox is unable to display website colors accurately due to Windows 7 High contrast theme overpowering

I have a website that controls a unique custom device. On this table, when you click on a cell, the color is sent to the device using javascript.

<table style="width:100%;" id= "ColorTable">
<tr>
    <td style="background-color:#FF8080;"><br/><br/></td>
    <td style="background-color:#FFFF80;"><br/><br/></td>
    <td style="background-color:#808000;"><br/><br/></td>     etc.

Unfortunately, on the Windows 7 computer used to control the device, the High Contrast theme #1 is active (sigh), per the customer's request.

While Windows XP ignored websites under theme changes, it seems that Windows 7 overrides website stylesheets in Firefox. When loading the site, cells appear black and send #000000 upon clicking.

Google Chrome displays colors as they are, while Internet Explorer does not.

Is there a way to ..

..instruct Firefox/websites to disregard Windows 7 themes?

..ask Windows 7 themes to let websites keep their appearance?

Attempts to modify compatibility settings and Firefox color preferences were unsuccessful.

Any assistance would be greatly appreciated!

htmlcsswindowsfirefoxthemes

Answer №1

While this question may have been asked a while back, I wanted to chime in just in case someone else is grappling with the same issue.

High-contrast themes serve a significant purpose when it comes to usability, similar to using braille on signs or ramps instead of stairs. Various applications such as Skype and Firefox automatically adjust their visuals based on these themes for better accessibility.

If you simply enjoy the aesthetic of high-contrast themes, consider opting for the classic theme and making adjustments to the settings until they align with your preferred theme.

Answer №2

Encountering this issue on Windows 10 was frustrating.

I discovered a simple solution that worked for me, and it might work for you too:

about:preferences#content → Colors...

Change the setting for Override the colors specified by the page with your selections above: from Only with High Contrast themes to Never.

(Check out the GreyEveTheme FINAL- Windows 10 High Contrast Theme that I'm using)

Answer №3

There is a known issue listed on Bugzilla related to this specific problem.

To address this issue, try implementing the following workaround by adding the code snippet below to the <body>:

<div class="high-contrast-test"></div>

Include the following CSS styling:

.high-contrast-test {
    width: 0;
    height: 0;
    background-image: url('#');
}

Utilize the provided JavaScript code:

$(document).ready(function () {

    // Detect high contrast mode for Firefox bug resolution
    // .high-contrast-test has a background-image,
    // absence of background-image indicates high contrast mode
    // https://bugzilla.mozilla.org/show_bug.cgi?id=452800
    if ($('.high-contrast-test').css('background-image') === 'none') {
        if ($('.Container').css('background-color') === 'rgb(255, 255, 255)') {
            $('html').addClass('hc-black-on-white');
        } else {
            $('html').addClass('hc-white-on-black');
        }
    }
});

You now have the option to override the HC mode CSS using CSS paths.

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