How to put non-transparent text inside a transparent div?

Question

I use opacity 0.9 for the div. All the text inside it also become transparent.

Answer 1

https://www.sololearn.com/Discuss/1314415/?ref=app

Answer 2

Child div CSS cannot override parent div opacity setting. Use background color to set opacity instead.

https://code.sololearn.com/Wn57F1SPbiAT/?ref=app