The colouring page depicts a young princess sitting on a throne, bathed in a warm, golden light. Her royal gown is lush and ornate, featuring intricate patterns and hues. The princess is wearing a dazzling tiara and a serene expression. To give the princess an air of opulence, I would use a palette of rich, regal tones, such as deep blues, luxurious purples and vibrant golds. The sky should be painted an azure blue and the throne a regal navy. The light should be a dazzling yellow or gold. The details in the princess' gown should be painted in contrasting and complementary shades to bring the intricate design to life. The tiara should be lit up with shining silver and sparkling diamonds. As a finishing touch, I would add a soft pink blush to the princess' cheeks, conveying the beauty and innocence of childhood.