This is another little palette hack - this time I started with a silver matchbox from the early 1900s. I've used the tiny pans from www.arttoolkit to fit 12 colours into the palette. I could use a sticker to create a white area for mixing - the 'Apple' product stickers work quite nicely! You can see more about palettes on my website here https://www.janeblundellart.com/palettes.html
Please note - the swatch of Cerulean Chromium looks more turquoise than it should. It is a blue - a greenish blue, but not that greenish! The other colours are fine. You can see the actual colour in the printout of the full range of Daniel Smith watercolours on my blog https://janeblundellart.blogspot.com/2017/04/daniel-smith-watercolour-full-range.html