Philips Hue Smart Light Starter Kit
There are actually a ton of smart light brands and options, but Philips Hue has the most mature ecosystem at the moment. If you want no-hassle devices the Hue lights are a great option for you. They have simple white, white ambiance (which has a full spectrum of whites up to full daylight), and full-color bulbs to choose from. There are several different price points among those, and any would be a great way to introduce smart lighting to someone in your life.