If you want to use many colors, you'll need to purchase an RGB LED matrix. These come in different sizes, such as 16x32, 32x32, 64x32, 64x64, and more.

RGB LEDs are great for adding a bit of color to your life, and it’s even more satisfying to use a matrix of them as a graphic display. [bitluni] built an RGB LED display with Pi Pico to which… ...