For a website, I have a list of some 500-1000 items. I would like to display them individually with(in) e.g. a colored card but also as combinations of 2 up to ~5 items/colors. So, if I would display a rose, it would be a red card; if a daffodil, it would be a yellow card. Together, it would make a card where I display red and yellow.
For all the items I would like to pick a color from a color palette that 1) is a reasonable reflection of the color of item and 2) is a color that combines well with the hundreds of other items and their colors.
Currently, I chose to work with the material design color palette, but I would like to have alternatives. I probably would not need a palette of 500-1000 colors, too much choice and and too colorful, but ~200 is probably effective. They should fit its purpose, i.e. being colors of flowers, or fruits/vegetables, or other applications.
Hence: Where to find or how to make large harmonious color palettes? A gpl palette would be practical outcome.