Talk about your favorite color. You should say:

What it is?
Why you like it?
Whether the color affects you in some aspects?

1.
a) If I had to describe my favorite color, I would choose yellow.

b) I am sure you have a favorite color too.

2.
a) Many artists are known to use yellow in their paintings.

b) For example, Vincent van Gogh is famous for the yellow sunflowers in some of his paintings.

3.
a) Many countries have yellow in their national flags.

b) For example, South Africa has a broad yellow band in their newly designed flag. This symbolizes the energy and warmth to be found in the nation.

There are several reasons as for why I would like to talk specifically about yellow as my favorite color. Allow me to explain by mentioning some of them briefly.

4.
a) First of all, to me, yellow symbolizes the sun.

b) What I mean to say is that it reminds me of energy and warmth.

5.
a) Secondly, yellow is a bright color as apposed to dull colors like brown and gray.

b) For instance, brown and gray usually make me feel depressed.

6.
a) Lastly, yellow is a practical color.

b) That is to say, you can wear yellow with almost any color, and it does not get dirty too easily.

7. So, those were some thoughts on my favorite color.