Colors & Colormaps

polarise ships with a curated set of built-in colors and colormaps that work with no additional dependencies. Built-in colormaps cover sequential and divergent use cases and are sourced directly from authoritative cpt-city files for pixel-accurate color reproduction.

When popular visualization packages are installed, polarise seamlessly extends its colormap support to their full collections — including matplotlib, cmcrameri (Fabio Crameri's Scientific Colour Maps), colorcet (Peter Kovesi's ColorCET), and colorspace (HCL-based perceptually uniform palettes).

Any colormap — whether built-in or from an optional package — can be reversed by appending _r to its name. For example, nuuk_r reverses the nuuk colormap from cmcrameri, and CET_L19_r reverses the built-in CET_L19.

Colors are available as named strings in any fill= or color= parameter. Colormaps are available in any cmap= parameter.

Fixed Colors

IBM Carbon Alerts

Status and alert colors from IBM Carbon Design System

alert_red

#DA1E28

alert_orange

#FF832B

alert_yellow

#FDDC69

alert_green

#24A148

CSS Standard

Standard CSS/web colors, organized by color family

Reds & Yellows

darkred

#8B0000

red

#FF0000

orange

#FFA500

gold

#FFD700

yellow

#FFFF00

Blues & Greens

navy

#000080

blue

#0000FF

steelblue

#4682B4

lightblue

#ADD8E6

lightgreen

#90EE90

olivegreen

#6B8E23

green

#008000

darkgreen

#006400

Purples & Pinks

purple

#800080

pink

#FFC0CB

Greys

white

#FFFFFF

lightgray

#D3D3D3

silver

#C0C0C0

gray

#808080

darkgray

#A9A9A9

black

#000000

Colormaps

built-in · selected from cmcrameri

Sequential

hawaii

acton

nuuk

lipari

davos

buda

Divergent

vik

managua

built-in · selected from colorcet

Sequential

CET_L20

CET_L19

CET_L17

Divergent

CET_D11

CET_D12

CET_I3

built-in · selected from matplotlib

viridis

plasma

built-in · selected from Diane Simoni

orange-to-purple

Custom Single-Hue

grays

reds

blues

greens

Sources & References

Source	Type	Colormaps
Fabio Crameri (v8.0.1)	Sequential	hawaii, acton, nuuk, lipari, davos, buda
Fabio Crameri (v8.0.1)	Divergent	vik, managua
Peter Kovesi / ColorCET	Sequential	CET_L17, CET_L19, CET_L20
Peter Kovesi / ColorCET	Divergent	CET_D11, CET_D12, CET_I3
matplotlib	Sequential	viridis, plasma
Custom single-hue	Sequential	grays, reds, blues, greens
Diane Simoni	Sequential	orange-to-purple

Scientific colour maps by Fabio Crameri — MIT license
https://www.fabiocrameri.ch/colourmaps/
Perceptually uniform sequential and diverging colormaps, sourced from cpt-city.

ColorCET by Peter Kovesi — CC BY 4.0
https://colorcet.com/
Perceptually uniform colormaps, sourced from cpt-city.

matplotlib — Hunter, J. D. (2007). Matplotlib: A 2D graphics environment.
Perceptually uniform sequential colormaps: viridis, plasma.

IBM Carbon Design System — Alert/status colors
https://carbondesignsystem.com/