Betta Fish: Changing even more?

I recently moved my betta fish to a heavily planted ten gallon, fully cycled. He seems to love it. His color has changed even more. He was a pearly color with a little spots of dark. Since I’ve moved him, his tail is even turning dark and a little hint of red? See what you think.

All params are great. No ammonia or nitrite. No nitrate but that’s normal due to my heavy plant load. I know my tank is cycled because I watched it go through a cycle. Both pics are from today.