Palette - Easy Color Manipulation in Python

Authors

Mike Spindel

Version

0.2

Palette makes it easy to perform simple operations on colors and to convert between different color systems and representations.

Sample Usage

Initialize a color object using whatever representation is convenient:

>>> c = Color("#0a0bcc")
>>> c = Color.from_rgb(255, 255, 255, a=0.5)
>>> c = Color(hls=(0.2, 0.1, 0.1))

Manipulate colors:

>>> a = Color("#aaaa00")
>>> a.lighter()
>>> a.darker(amt=0.4)

Measure Colors:

>>> a = Color("#aaaa00")
>>> b = Color("#000000")
>>> a.w3_contrast_ratio(b)
>>> a.w3_contrast_test(b)
>>> a.luminance

Convert Representations:

>>> a = Color("#aaaa00")
>>> a.rgb8.r
170
>>> a.rgb8.r = 30
>>> tuple(a.rgb8)
(30.0, 170.0, 0.0)
>>> tuple(a.hls)
(0.30392156862745096, 0.3333333333333333, 1.0)
>>> str(a.hls)
'hls(0.30392156862745096, 0.3333333333333333, 1.0)'
>>> a.hex
'#1eaa00'
>>> a.css
'rgb(170, 170, 0)'

Convert sRGB:

>>> a = Color("#aaaa00")
>>> a.workspace
"srgb"
>>> a.rgb == a.srgb
True
>>> a.linear_rgb
{'r': 0.4019777798321958, 'b': 0.0, 'g': 0.4019777798321958}
>>> a.linear_rgb = (.2, .3, .3)
>>> a.rgb
(0.48452920448170694, 0.5838314900602575, 0.5838314900602575)

Where Does Palette Fit In?

There already exist several good python libraries for manipulating color. Perhaps the two most notable are Grapefruit and python-colormath. Palette hopes to fill a niche somewhere between the two.

With respect to grapefruit, palette intends to have:

• a simpler interface for common tasks
• more sophistication with respect to RGB working spaces, illuminants, etc.
• PEP-8 compliance

With respect to python-colormath, palette intends to have:

• a simpler interface for common tasks; potentially at the expense of deep support for non-RGB colors.
• more utilities that are primarily useful for web development
• support for fewer colorspaces. Palette isn't particularly interested in completionism.
• no dependency on numpy