When we set the
opacity for a parent element,
all the child elements also inherit the same value:
Opacity of the div is set to
but the child elements
p also become semi-transparent.
This makes it hard to read the text.
If we want the opacity to apply only to the background,
we can specify the background color value using
rgba instead of using
rgba(red, green, blue, alpha)
alpha parameter sets the opacity.
It takes in any value