Q1. What does background-color property do?

background-color sets the background color of an element. It can use any valid color format.

Q2. Can background-color be applied to any element?

Yes, background-color can be applied to any HTML element, including block, inline, and inline-block elements.

Q3. What is the default value of background-color?

The default value is transparent, allowing parent backgrounds to show through.

Q4. How do you set a semi-transparent background?

Use RGBA or HSLA colors: background-color: rgba(255,0,0,0.5); for 50% transparent red.

Q5. What is the difference between background-color and background?

background is a shorthand property that can set multiple background properties at once, including color, image, position, and repeat.