Combining oil paint colours is an essential skill for any artist hoping to enhance their work with depth and vibrancy. To begin, it's crucial to understand the basics of colour theory. Familiarise yourself with the colour wheel, which showcases primary, secondary, and tertiary colours.

When mixing, always start with small amounts of paint on your palette, allowing you to experiment without wasting materials. Use a palette knife for blending; this ensures a smooth mixture and keeps your brushes clean. Remember, the key to creating harmonious colours lies in the balance — for instance, adding a touch of complementary colour can create shadows and enhance the vibrancy of the main hue.

Don't shy away from experimentation; sometimes the most unexpected combinations lead to striking results. Keep a journal of your mixtures and notes on what works and what doesn’t. Over time, you’ll develop a personal palette that reflects your unique style and artistic voice. Embrace the journey of mixing, and let your creativity flourish!