simple-palette-utils

Python3 library makes dealing with color palettes easy.

Installation

From PyPI:

pip install simple_palette_utils

The latest code straight from the repository:

pip install git+https://github.com/waikato-datamining/simple-palette-utils.git

Palettes

Available palettes:

• PALETTE_GRAYSCALE
• PALETTE_X11
• PALETTE_LIGHT (from PALETTE_X11)
• PALETTE_DARK (from PALETTE_X11)
• PALETTE_COLORBLIND8
• PALETTE_COLORBLIND12
• PALETTE_COLORBLIND15
• PALETTE_COLORBLIND24

Usage

Generating lists of color triplets:

from simple_palette_utils import colors, x11_colors, COLOR_LIST_LIGHT

p = colors(COLOR_LIST_LIGHT)
print("colors/light\n", p)

p = x11_colors(no_light=True)
print("x11_colors/no light colors\n", p)

Generating palette lists:

from simple_palette_utils import default_palette, grayscale_palette, PALETTE_X11, PALETTE_COLORBLIND8

p = default_palette()
print("default_palette\n", p)

p = default_palette(PALETTE_X11)
print("default_palette/X11\n", p)

p = default_palette(PALETTE_COLORBLIND8)
print("default_palette/colorblind8\n", p)

p = grayscale_palette(32)
print("grayscale_palette/32\n", p)

Generating palettes for indexed PNGs (get filled up to 256*3 values with grayscale colors):

from simple_palette_utils import generate_palette_list, PALETTE_COLORBLIND8

p = generate_palette_list()
print("generate_palette_list\n", p)

p = generate_palette_list(PALETTE_COLORBLIND8)
print("generate_palette_list/colorblind8\n", p)

p = generate_palette_list("255,0,0,0,255,0,0,0,255")
print("generate_palette_list/custom RGB values\n", p)

Setting the palette for a Pillow Image:

from PIL import Image
from simple_palette_utils import generate_palette_list, PALETTE_X11

img = Image.effect_noise((500, 500), 25)  # sigma=25
img.putpalette(generate_palette_list(PALETTE_X11))
img.save("demo.png")

Extending color lists/palettes:

from simple_palette_utils import colors, generate_palette_list, add_palette, add_color_list

my_colors = [
    "#C0C0C0",
    "#808080",
    "#000000",
    "#FF0000",
    "#800000",
    "#FFFF00",
    "#808000",
    "#00FF00",
    "#008000",
    "#00FFFF",
    "#008080",
    "#0000FF",
    "#000080",
    "#FF00FF",
    "#800080",
]
add_color_list("mycolors", my_colors)
add_palette("mycolors", my_colors)

p = colors("mycolors")
print("colors\n", p)

p = generate_palette_list("mycolors")
print("palette\n", p)

Overriding default PALETTE_GRAYSCALE with custom values:

from simple_palette_utils import generate_palette_list, add_palette, PALETTE_GRAYSCALE

gray_colors = [
    "#000000",
    "#202020",
    "#404040",
    "#606060",
    "#808080",
    "#A0A0A0",
    "#C0C0C0",
    "#E0E0E0",
]
add_palette(PALETTE_GRAYSCALE, gray_colors)
p = generate_palette_list(PALETTE_GRAYSCALE)
print("custom gray\n", p)

Convert flat palette list into list of RGB triplets:

from simple_palette_utils import generate_palette_list, PALETTE_GRAYSCALE, palette_list_to_triplets

p = generate_palette_list(PALETTE_GRAYSCALE)
print("flat list\n", p)
t = palette_list_to_triplets(p)
print("triplets\n", t)