Understanding the Meaning of 'Vibrant'

Maria loved to explore nature. One day, she decided to take a walk in the park. She enjoyed the vibrant colors of the flowers and the sound of birds chirping. As she walked, she noticed a small path leading off the main trail. Curious, she followed the path and discovered a hidden garden. The garden was filled with beautiful plants and was a peaceful place to relax.

In this passage, the word 'vibrant' is used to describe something about the flowers. What does 'vibrant' mean in this context?