New Palette & Color Chart

I have a new paint palette & hence a new color chart. While I am certain that I will be adding permanent sap green to the upper row, I am uncertain what red I will be adding to complete that compliment. Tradition would dictate I add yellow between the red & blue, but I rarely use it & so I am leaving that space for experimentation. 
Some might question why I work off of small palettes, the answer is simple: I like them. Small palettes are maneuverable, travable, you can always get your paint close to the paper & when working with very wet paint as I am apt to do, dripping across your palette & work surface is a hazard to contend with. Not depicted in the color chart is the white gouache; it might be added later, but it did not seem necessary. I am very happy to have the handle cover fold over the white as a way of keeping it free from splatter. My ideal palette would be large wells with individual covers; if that existed I think I would give up a small palette for everyday & instead use it only for travel. I welcome any suggestions on a red to add to the palette. Happy Thursday Y'all!