You can use the :hover pseudo-class to create a mouseover effect on elements and change their color, including for a multicolored SVG icon.

Using CSS, you can do this like shown in the example below:

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.multicolor-svg {
  fill: #1e90ff;
}

.multicolor-svg:hover {
  fill: #d81313;
}

You can find more details on how to change a SVG color on hover with CSS here.

In CSS, you can make an element on your page expand when you hover over it. To do this, you can use the :hover selector.

Here's an example of how you could use :hover to expand a button element:

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button {
  width: 70px;
  height: 30px;
}

button:hover {
  transform: scale(1.2);
}

In this example, the transform: scale(1.2); line tells the browser to scale the element up to 120% of its original size when the mouse hovers over it.

A tool tip is a small pop-up window that appears when the mouse is hovered over an element in an application such as text, an image, or a button. It displays some information or description about the element and disappears when the point moves away. Tool tips are also known as infotips, help tips, or hints.

The easiest way to apply a hover effect to an element in CSS is by using the :hover pseudoclass. For example, to create a style that changes the background color of a button when it is hovered over, you can define the following in a CSS stylesheet:

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button:hover {
    background-color: #efefef;
}

On an HTML page, you can use CSS to change the style of a link when it's hovered over. To do this, you can use the :hover CSS selector. For example, if you want the color of the link to change to green when the user hovers over it, you can insert the following code into your CSS file:

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a:hover {
  color: green;
}

More information about the :hover selector can be found on the Mozilla Developer Network: MDN - :hover

You can create a gradient button with a neon effect in CSS using the linear-gradient property. Add the text-shadow property and set it according to the desired effect. You can also change the border-radius property to increase or decrease the border's size.

For example:

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.button {
    background: linear-gradient(to right, blue, red, orange);
    text-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 30px #fff;
    border-radius: 8px;
    color: yellow;
    border: 2px solid white;
}

.button:hover {
    background: linear-gradient(to top, blue, red, orange);
    text-shadow: 0 0 10px #fff, 0 0 20px #ff0, 0 0 30px #ff0;
    border: 2px solid #ffa;
}

For more details, please refer to the following guide: CSS Gradient Button With Neon Effect.

You can create a hovering red-blue button in CSS and Java by using the :hover pseudo-class on the <button> element. In this example, the button's color will transition from red to blue when a user's mouse pointer hovers over the button.

CSS:

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button {
    background-color: red;
}

button:hover {
    background-color: blue;
}

JavaScript:

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let button = document.querySelector('button');
button.onmouseover = function(){
  this.style.backgroundColor = 'blue';
}
button.onmouseout = function(){
  this.style.backgroundColor = 'red';
}

In HTML and CSS, you can underline text on hover with the following code:

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a:hover {
  text-decoration: underline;
}

You'll need to wrap this code in a style tag. For example:

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<style> 
  a:hover {
    text-decoration: underline;
  }
</style>

For more information, you can refer to the CSS Hover Activity guide.

Using CSS you can create an effect that makes text appear to be "hovering" on the screen. To do this, you need to create two separate classes, one for when the mouse is hovering over the text (for example, when the mouse is hovering over a link on a page) and one for when the mouse is not hovering over the text. To create the hover effect, you set different values on the text-decoration property between the two classes.

An example of using the :hover effect to underline text is provided here:

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.text {
  text-decoration: none;
}

.text:hover {
  text-decoration: underline;
}

Using CSS, you can edit the background color when a user hovers over an element by using the :hover selector. An example of this can be seen below:

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div:hover {
  background-color: red;
}

When a user hovers over the div element, the background will be changed to red. More information about this can be found here.

To change the color of a link when hovering over it, you can use the CSS pseudo-class :hover. For example:

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a:hover {
  color: red;
}

This code will change the color of the link to red when you hover your mouse over it. You can also use other CSS properties and values to style a link. For more information, see the Mozilla Developer Network reference for the :hover pseudo-class.