The Christmassy image is of Dee-Dee Jonrowe racing down the Yukon in the Alaskan Iditarod race. The "green" and the "black" is the same paint, Perylene Green PBk 31, self-shading by glazing layers. The only other colour is PR254, universally available as Winsor Red. These two mix well for a deeper black, or if you want a black hole, mix Perylene "Green" with Dioxazine Purple PV23. All three are from Winsor & Newton's Professional Watercolor range. The trees were made with a Royal Softgrip synthetic filbert comb which I bought locally for €3 and the dogs, sled and musher were painted with a size 12 Kolinsky sable simply because I had it in my hand already. The paper was handmade and bound into a sketchbook in India, imported by a sister-company to The Diary Shop, is 100% cotton and came in a beautifully embossed leather cover I bought on Ebay.
If you want one search British Ebay for the Star Pilgrim refillable diary at The Diary Shop. I bought green and brown A5 covers which are handy for working at either a desk or en plein air, and the refillable sketchbooks from the same source give me choice of smooth or textured paper. The design carries from edge to edge across the spine, so I show the front of the green one and the back of the brown one. The covers are big enough to hold 9x6in sketchbooks like Fabriano's Venezia, but I like two of the three kinds of paper in The Diary Shop's A5 refill sketchbooks, the cartridge, which appears to contain cotton too and is sized and advertised to handle wet media (it does, very well), and the hard-sized cotton which is also fabulously versatile — but you have to ask for this one especially, or you get the standard cotton paper, which I'm sure, by analogy with the two I have, fulfills its brief admirably, but without wet media resistance because (at a guess) The Diary Shop's owner sketches in his, whereas the dry-est media I carry is a fountain pen with a water brush handy for shading.