The two mice stand in front of an easel, the brown and white mouse holding a paintbrush and the grey and white mouse holding a pencil. The paintbrush and pencil are both a testament to their creativity and how they are more than just ordinary mice. The white and brown mouse could be brightened up with a warm brown and orange, while the grey and white mouse could be made more visually interesting with various shades of grey and white, reflecting their elegant and artistic nature. The paint on their tails give them a unique character and can be coloured in bold and vibrant colours, making it visually eye-catching. To complete the scene, you could colour in the background with a bold and vibrant blue, suggesting the vast and boundless world of creativity that is open to the two mice.