Colors and backgrounds

color sets the text color, while background-color paints an element's background. Colors may use names, hexadecimal values, or RGB notation. Always keep enough contrast between text and its background.

Read a rule first

A CSS declaration uses property: value;. The semicolon ends one declaration, and braces group declarations for the same selector. The browser reads rules from top to bottom. When several rules match one element, the cascade considers their source, selector specificity, and order.

<section class="notice">
  <h2>Course update</h2>
  <p>A new lesson is ready.</p>
</section>

.notice {
  color: #164e63;
  background-color: #cffafe;
  padding: 18px;
}

Change one value at a time and watch the text, color, size, or position. This connects each declaration to a visible result. Browser developer tools show the result of the same matching process.

A useful checking order

• Confirm that the selector matches the intended HTML element.
• Check the property name, colon, value, and semicolon.
• Test narrow space, longer text, and keyboard use.

<section class="notice">
  <h2>Course update</h2>
  <p>A new lesson is ready.</p>
</section>

.notice {
  color: #164e63;
  background-color: #cffafe;
  padding: 18px;
}

A common source of confusion

CSS changes presentation and layout; it does not change the meaning of the HTML. Keep meaningful HTML elements and style them, rather than choosing the wrong element only for its default appearance. Readability comes before decoration.

<section class="notice">
  <h2>Course update</h2>
  <p>A new lesson is ready.</p>
</section>