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问题:

Follow this article (Style text input placeholder), i can change the color of the text input placeholder to red color. But it is always a light-red color, not red exactly.

Is there any way to make it a red color exactly?

update

The color on Chrome is red (this is correct), the color on Firefox is not red, it is light-red or blurred, i guessed that.

EDIT (from the OP answer):

Please check this example (http://jsfiddle.net/LQkQG/), the color is red on Chrome, but light-red on Firefox. I want the color on Firefox same with the Chrome.

回答1:

I've found you need to override opacity.

::-webkit-input-placeholder { /* WebKit browsers */
    color:    red;
     opacity: 1 !important;
}

回答2:

Yes, by setting its value through HEX (hexadecimal) you get better control of what color to use. The color for bright red (as red as it gets) is #FF0000

Firefox, however is a rebel needs to be told what opacity to use.

For reference take a look at this chart

::-webkit-input-placeholder {
    color: #FF0000;
    opacity: 1 !important; /* for older chrome versions. may no longer apply. */
}

:-moz-placeholder { /* Firefox 18- */
    color: #FF0000;
    opacity: 1 !important;
}

::-moz-placeholder {  /* Firefox 19+ */
    color: #FF0000;
    opacity: 1 !important;
}

:-ms-input-placeholder {  
   color: #FF0000;
}

回答3:

Input a hexidecimal value for the color.

Maybe use a tool like http://www.colorpicker.com/ ?

回答4:

visit: http://www.w3schools.com/html/html_colors.asp

<html>
<head>
<style type="text/css">

    input, textarea { color: #000; }
    .placeholder { color: #aaa; }
</style>
</head>
<body>
<form action="" method="post">

            <input type="text" name="user" placeholder="enter a text" />
            <input type="submit" value="submit" onclick="test()" />
</form>

in the place of color code you can write which ever color you want