He looks very pretty. His color is common, but had a unique way of being on his body. I suggest getting a bigger tank. At the least a 2 gallon tank that you can find at a local pet store. Also, i would also suggest taking out the plastic plant too because that can easily tear his beautiful fins.
Good Luck and hope you decide well on a bigger tank for your beautiful betta. If he is your only betta, you should SPOIL him rotten.
He seems healthy and happy. I see a nice bubblenest going on there in the corner.