colors.py

from typing import Dict, Tuple

import matplotlib.colors as mpl_colors
import seaborn as sns  # type: ignore

# "darkorange", "purple", "cyan4"
colors = [[255, 140, 0], [160, 32, 240], [0, 139, 139]]
colors = [(r / 255.0, g / 255.0, b / 255.0) for r, g, b in colors]

palette: Dict[str, Tuple[float, float, float]] = {
    "Adelie": colors[0],
    "Chinstrap": colors[1],
    "Gentoo": colors[2],
    "default": sns.color_palette()[0],  # type: ignore
}

bg_palette = {}
# Use `sns.set_style("whitegrid")` to help find approx alpha value
for name, col in palette.items():
    # Adjusted n_colors until `axe` accessibility did not complain about color contrast
    bg_palette[name] = mpl_colors.to_hex(sns.light_palette(col, n_colors=7)[1])  # type: ignore