To change the color of the text using CSS, you can use the color property. This property can be applied to any HTML element that displays text, such as a paragraph, heading, or link.

Here's an example code block using CSS:

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p {
  color: blue;
}

In this example, all paragraphs (<p>) will have blue text color. You can replace p with the CSS selector for the element you want to change the text color of.

You can also use other color values such as hexadecimal, RGB, or color name. Here's an example of using hexadecimal value:

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h1 {
  color: #ff0000;
}

In this example, all <h1> elements will have red text color because #ff0000 is the hexadecimal value for red.

To change the background color in CSS, you can use the background-color property. Here's an example code snippet in CSS:

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body {
  background-color: blue;
}

This will change the background color of the body element to blue. You can replace blue with any valid color name, hexadecimal code or RGB value. Here's an example using a hexadecimal code:

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body {
  background-color: #333333;
}

This will change the background color of the body element to a dark grey color. You can learn more about CSS colors and how to use them in the following link: https://www.w3schools.com/cssref/css_colors.asp

To change the background color in CSS, you can use the background-color property.

Here's an example to change the background color to blue:

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body {
  background-color: blue;
}

You can also use other color formats such as hexadecimal or RGB. Here's an example using hexadecimal:

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body {
  background-color: #ff0000; /* red color */
}

And here's an example using RGB:

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body {
  background-color: rgb(255, 0, 0); /* red color */
}

You can learn more about CSS background-color property here.

The hexadecimal notation for light blue is #ADD8E6.

The hexadecimal value of green is #00FF00.

The hexadecimal value for purple is #800080.

You can change the background colour in CSS with the background-color property.

In its simplest form you can use the following syntax:

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body {
  background-color: #rrggbb;
}

where #rrggbb is a hexadecimal value representing the red, green and blue components of the desired colour.

For more information on specifying hexadecimal colour values please see the MDN web docs article here.

You can change the background color using the CSS background property. The following code demonstrates how to set the background of an HTML page to a color with the hexadecimal value #d3d3d3:

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body { 
  background-color: #d3d3d3;
}

Alternatively, you can set the background to the name of a color, such as "red". In that case, the code would be:

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body { 
  background-color: red;
}

You can find more information on setting the background color with CSS on Mozilla's Developer Network website.