The vibrant colors of the coloring page create a beautiful scene, with a small yellow baby kangaroo nestled in tall grass looking up to a friendly orange tiger. The tiger's large mouth is curved into a friendly smile and its tail is pointing up in the air. The warm yellow of the baby kangaroo is a lovely contrast to the bold orange of the tiger, and I think adding a soft pink tone to the tall grass would create a beautiful atmosphere. You could also use a deep blue or green to add some shading and texture to the tiger's fur. Additionally, I think outlining the baby kangaroo with a darker shade of yellow or a light brown to make him stand out against the grass would be appealing. An additional hint of red or white in the tiger's eyes will bring the page to life. With this combination of bright colors, this page will be sure to jump off the page!