使用 CSS 更改 HTML5 输入占位符颜色

Chrome 支持 占位符属性(其他人可能也这样做)。

但是以下 CSS 对占位符的值没有任何影响:

input[placeholder], [placeholder], *[placeholder] {
    color: red !important;
}
<input type="text" placeholder="Value">

但是Value 仍然会保持grey 而不是red

有没有办法改变占位符文本的颜色?

/* do not group these rules */
*::-webkit-input-placeholder {
    color: red;
}
*:-moz-placeholder {
    /* FF 4-18 */
    color: red;
    opacity: 1;
}
*::-moz-placeholder {
    /* FF 19+ */
    color: red;
    opacity: 1;
}
*:-ms-input-placeholder {
    /* IE 10+ */
    color: red;
}
*::-ms-input-placeholder {
    /* Microsoft Edge */
    color: red;
}
*::placeholder {
    /* modern browser */
    color: red;
}
<input placeholder="hello"/> <br />
<textarea placeholder="hello"></textarea>

This will style all input and textarea placeholders.

Important Note: Do not group these rules. Instead, make a separate rule for every selector (one invalid selector in a group makes the whole group invalid).

In Firefox and Internet Explorer, the normal input text color overrides the color property of placeholders. So, we need to

::-webkit-input-placeholder { 
    color: red; text-overflow: ellipsis; 
}
:-moz-placeholder { 
    color: #acacac !important; text-overflow: ellipsis; 
}
::-moz-placeholder { 
    color: #acacac !important; text-overflow: ellipsis; 
} /* For the future */
:-ms-input-placeholder { 
    color: #acacac !important; text-overflow: ellipsis; 
}
</div>

I just realize something for Mozilla Firefox 19+ that the browser gives an opacity value for the placeholder, so the color will not be what you really want.

input::-webkit-input-placeholder, textarea::-webkit-input-placeholder {
    color: #eee; opacity:1;
}
input:-moz-placeholder, textarea:-moz-placeholder {
    color: #eee; opacity:1;
}
input::-moz-placeholder, textarea::-moz-placeholder {
    color: #eee; opacity:1;
}
input:-ms-input-placeholder, textarea:-ms-input-placeholder {
    color: #eee; opacity:1;
}

I overwrite the opacity for 1, so it will be good to go.

I don't remember where I've found this code snippet on the Internet (it wasn't written by me, don't remember where I've found it, nor who wrote it).

$('[placeholder]').focus(function() {
        var input = $(this);
        if (input.val() == input.attr('placeholder')) {
            input.val('');
            input.removeClass('placeholder');
        }
    }).blur(function() {
        var input = $(this);
        if (input.val() == '' || input.val() == input.attr('placeholder')) {
            input.addClass('placeholder');
            input.val(input.attr('placeholder'));
        }
    }).blur();
    $('[placeholder]').parents('form').submit(function() {
        $(this).find('[placeholder]').each(function() {
            var input = $(this);
            if (input.val() == input.attr('placeholder')) {
                input.val('');
            }
        })
    });

Just load this JavaScript code and then edit your placeholder with CSS by calling this rule:

form .placeholder {
   color: #222;
   font-size: 25px;
   /* etc. */
}
</div>

I think this code will work because a placeholder is needed only for input type text. So this one line CSS will be enough for your need:

input[type="text"]::-webkit-input-placeholder {
    color: red;
}
</div>

How about this

<input type="text" value="placeholder text" onfocus="this.style.color='#000'; 
    this.value='';" style="color: #f00;" />

No CSS or placeholder, but you get the same functionality.

I have tried every combination here to change the color, on my mobile platform, and eventually it was:

-webkit-text-fill-color: red;

which did the trick.