The mandala coloring page is truly beautiful and mesmerizing. Coloring this page would give you a great opportunity to practice your artistic skills and explore the beauty of different colors. When coloring this page, make sure to keep the original design intact and use a range of different colors to paint the petals and curved lines. For the center circle, you could use a metallic gold or silver to give it a glossy and regal look. For the petals, use bright and vibrant colors like red, orange, yellow, green, blue, purple, pink, and white. To bring out the sharp lines of the petals, use a thin sharp tip pen or brush to outline them in black. For the curved lines, go for the same range of colors as the petals but in a lighter and softer tone. This will create an ombre effect and brighten the overall art piece. Finally, add a few details of your own to make your coloring page unique.