On Sat, Jul 21, 2012 at 1:21 PM, klo uo <klo...@gmail.com> wrote:
> Hi,
>
> I read previous mail about "colormaps" which reminded me to a question
> I had about MPL colors.
> Colors in MPL plots are dark, and pale, and not is some specific color
> theme but it's just pale dark.
> I thought that usually people make plots brighter (as more attractive ;) )
>
>
The default color cycle chosen is the same as many of the other popular
plotting tools, however, we provide the mechanism to define your own
cycles. Admittedly, this isn't quite as good as I would like it, but that
is the rationale for the chosen default.
> If you can, have a look at this plot I just made, and same image with
> same named colors as set by CorelDraw for example:
> http://i.imgur.com/y29xD.png
>
> As you all probably know cyan is not cyan but teal, and green is with
> 50% green, and every color is not as expected, except red and blue.
> I don't know much about color systems and color space, so thought to
> ask why is it like this and if colors can be somehow differently
> defined at user end?
>
>
If you import matplotlib.colors, you can modify the "cnames" dictionary
like so:
import matplotlib.colors as mcolors
mcolors.cnames['cyan'] = mcolors.cnames['teal']
mcolors.cnames['green'] = '#00FF00'
As for using a CMYK system, the idea has been floated before and I
certainly would not be adverse to it. But for backwards compatibility, we
would have to continue to support the RGB system. There has been talk
about reworking the way colors are handled in matplotlib to use class
objects in order to unify the myriad of ways that colors can be specified
by the users. Such a scheme would make the simultaneous use of CMYK and
RGB possible if they are both derived from a common base-class.
As for the assertion that HTML colors aren't used, that is incorrect. The
named colors follow the HTML list. Here is our list:
https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/colors.py#L62
and here is the html list:
http://html-color-codes.info/color-names/
Cheers!
Ben Root
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