This mandala is depicting the Anahata chakra, the fourth chakra associated with the element of air. It is found at the center of the chest and symbolizes our personal capacity to love, be loved, and forgive. At the center of this mandala is the lotus flower with 12 petals, representing the 12 zodiac signs. Surrounding the heart is an outer ring of flame, the symbolism of which relates to the spiritual rise from false passions.
When coloring this mandala, I would suggest using gentle and soothing colors. Shades of green, pink, and blue are particularly beautiful and calming, fitting this visualization of the Anahata chakra. Incorporate gradients and dots to give texture and dimension to the design; for example, you could use lighter and darker variations of a hue to convey the burning flame in the outer ring. Embrace the emotion of this moment and choose the colors that are true to this source of intuitive energy. Finishing the design with a moderate touch of glittery white paint can add a calming twinkle, giving this mandala an even more magical feel.