Light does all the work and colour gets all the credit... I am not sure where I first came across that notion but I reflect on it often. My paint colour choices are intuitive. I mix my own in acrylic colours using the 'science' of colour theory to get the right hue, tone and saturation. In painting, I like to work both 'thinly' and 'thickly'. I am a 'scrapist' - a term to describe how I use the palette knife to 'carve' into impasto thick paint to reveal the image in either the remainder of the paint or from the dried paint underneath. I also use other media, working with pastel, charcoal, watercolour and oil bars and if it feels right sometimes mix it all up!.