This design features a vibrant and playful birthday celebration theme. Dominating the center is a large, stylized number 4, which is colored in a striking shade of blue. The number is adorned with a purple fish, adding a touch of whimsy to the design. To the right of the number 4, there's a yellow crown, symbolizing royalty or a special occasion. The crown is placed above a blue fish, creating a harmonious color scheme. Scattered around the image are blue bubbles, giving the impression of a festive underwater scene. The bubbles are of varying sizes, adding depth to the design. The phrase "Birthday" is written in a cursive font, located at the bottom of the image. This text is in a contrasting color, ensuring it stands out against the colorful background. Overall, the image is a delightful and colorful representation of a birthday celebration, with a focus on the number 4 and the theme of the ocean.