pbmc3k_colors = {
    "louvain": {
        "B cells": "#2ca02c",
        "CD14+ Monocytes": "#ff7f0e",
        "CD4 T cells": "#1f77b4",
        "CD8 T cells": "#d62728",
        "Dendritic cells": "#e377c2",
        "FCGR3A+ Monocytes": "#8c564b",
        "Megakaryocytes": "#bcbd22",
        "NK cells": "#9467bd",
    }
}