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comp / comp.lang.python / Re: good way to choose 15 colors? Or 20, more? (adjacent colors should look different)

SubjectAuthor
* good way to choose 15 colors? Or 20, more? (adjacent colors should look differenHenHanna
+* Re: good way to choose 15 colors? Or 20, more? (adjacent colors should look diffDFS
|`- Re: good way to choose 15 colors? Or 20, more? (adjacent colors should look diffHenHanna
`* Re: good way to choose ... (adjacent colors should look different) (Posting On PLawrence D'Oliveiro
 `- Re: good way to choose ... (adjacent colors should look different) (Posting On PHenHanna

1
Subject: good way to choose 15 colors? Or 20, more? (adjacent colors should look different)
From: HenHanna
Newsgroups: comp.lang.python
Organization: A noiseless patient Spider
Date: Tue, 2 Jul 2024 14:49 UTC
Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: HenHanna@devnull.tb (HenHanna)
Newsgroups: comp.lang.python
Subject: good way to choose 15 colors? Or 20, more? (adjacent colors should
look different)
Date: Tue, 2 Jul 2024 07:49:59 -0700
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black= (0,0,0)
white= (255,255, 255)
blue= (0, 0, 128)
pink= (245, 182, 193)
green= (0, 128, 0)
gray= (105,105, 105)
red= (128, 0,0)
yellow= (255, 255,0)
cyan= (0, 255, 255)
magenta= (255,0, 255)
purple= ( 160, 32, 240) ------------------ that's 11 colors

What's a good way to choose 15 colors? Or 20 colors? Or more?

(adjacent colors should look different)

Subject: Re: good way to choose 15 colors? Or 20, more? (adjacent colors should look different)
From: DFS
Newsgroups: comp.lang.python
Date: Tue, 2 Jul 2024 17:27 UTC
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Subject: Re: good way to choose 15 colors? Or 20, more? (adjacent colors
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On 7/2/2024 10:49 AM, HenHanna wrote:
>
> black= (0,0,0)
> white= (255,255, 255)
> blue= (0, 0, 128)
> pink=  (245, 182, 193)
> green= (0, 128, 0)
> gray= (105,105, 105)
> red= (128, 0,0)
> yellow= (255, 255,0)
> cyan= (0, 255, 255)
> magenta= (255,0, 255)
> purple= ( 160, 32, 240)  ------------------  that's 11 colors
>
>
> What's a good way to choose 15 colors?   Or 20 colors?  Or more?

1) choose from lists of predefined colors
https://www.rapidtables.com/web/color/RGB_Color.html
https://www.w3schools.com/html/html_colors_rgb.asp
https://excelatfinance.com/xlf/media/xlf-colindx2ws.png

2) predefine and name your own colors manually, then pick the colors at
random from a list

3) generate random r,g,b values between 0 and 255, and name the
resultant colors.

4) generate r,g,b values in ranges known to produce greens, reds, blues,
oranges, yellows, etc. You could name them consecutively: green1,
green2, green3...

>  (adjacent colors should look different)

What are 'adjacent colors'?

Subject: Re: good way to choose 15 colors? Or 20, more? (adjacent colors should look different)
From: HenHanna
Newsgroups: comp.lang.python
Organization: A noiseless patient Spider
Date: Tue, 2 Jul 2024 19:49 UTC
References: 1 2
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From: HenHanna@devnull.tb (HenHanna)
Newsgroups: comp.lang.python
Subject: Re: good way to choose 15 colors? Or 20, more? (adjacent colors
should look different)
Date: Tue, 2 Jul 2024 12:49:18 -0700
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On 7/2/2024 10:27 AM, DFS wrote:
> On 7/2/2024 10:49 AM, HenHanna wrote:
>>
>> black= (0,0,0)
>> white= (255,255, 255)
>> blue= (0, 0, 128)
>> pink=  (245, 182, 193)
>> green= (0, 128, 0)
>> gray= (105,105, 105)
>> red= (128, 0,0)
>> yellow= (255, 255,0)
>> cyan= (0, 255, 255)
>> magenta= (255,0, 255)
>> purple= ( 160, 32, 240)  ------------------  that's 11 colors
>>
>>
>> What's a good way to choose 15 colors?   Or 20 colors?  Or more?
>
>
> 1) choose from lists of predefined colors
> https://www.rapidtables.com/web/color/RGB_Color.html
> https://www.w3schools.com/html/html_colors_rgb.asp
> https://excelatfinance.com/xlf/media/xlf-colindx2ws.png
>
> 2) predefine and name your own colors manually, then pick the colors at
> random from a list
>
> 3) generate random r,g,b values between 0 and 255, and name the
> resultant colors.
>
> 4) generate r,g,b values in ranges known to produce greens, reds, blues,
> oranges, yellows, etc.  You could name them consecutively: green1,
> green2, green3...
>
>
>
> >  (adjacent colors should look different)
>
> What are 'adjacent colors'?
>

black= (0,0,0)
white= (255,255,255) .............

from PIL import Image
from PIL import ImageDraw

def newImg():
img = Image.new('RGB', (120, 120))

for i in range(100):
img.putpixel((10+i,10+i), (red, black, white)[i%3])

img.save('test.gif')
return img

Thanks.... for what i mean by [adjacent] pls see above.

.............good ways to choose 15, 20, or more colors in Python,
ensuring adjacent colors look different:

1. Colormaps:

Import libraries:

Python
import matplotlib.pyplot as plt
from matplotlib.cm import get_cmap

Choose a colormap:

There are many built-in colormaps in Matplotlib. Some that provide good
visual distinction between adjacent colors include:

viridis

plasma

inferno

cividis

coolwarm (for diverging color schemes)

Subject: Re: good way to choose ... (adjacent colors should look different) (Posting On Python-List Prohibited)
From: Lawrence D'Oliv
Newsgroups: comp.lang.python
Organization: A noiseless patient Spider
Date: Tue, 2 Jul 2024 21:41 UTC
References: 1
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From: ldo@nz.invalid (Lawrence D'Oliveiro)
Newsgroups: comp.lang.python
Subject: Re: good way to choose ... (adjacent colors should look different)
(Posting On Python-List Prohibited)
Date: Tue, 2 Jul 2024 21:41:12 -0000 (UTC)
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On Tue, 2 Jul 2024 07:49:59 -0700, HenHanna wrote:

> What's a good way to choose 15 colors? Or 20 colors? Or more?
>
> (adjacent colors should look different)

Something like this
<https://www.deviantart.com/default-cube/art/Related-Colours-726210156>,
perhaps?

Subject: Re: good way to choose ... (adjacent colors should look different) (Posting On Python-List Prohibited)
From: HenHanna
Newsgroups: comp.lang.python
Organization: A noiseless patient Spider
Date: Wed, 3 Jul 2024 03:12 UTC
References: 1 2
Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: HenHanna@devnull.tb (HenHanna)
Newsgroups: comp.lang.python
Subject: Re: good way to choose ... (adjacent colors should look different)
(Posting On Python-List Prohibited)
Date: Tue, 2 Jul 2024 20:12:59 -0700
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On 7/2/2024 2:41 PM, Lawrence D'Oliveiro wrote:
> On Tue, 2 Jul 2024 07:49:59 -0700, HenHanna wrote:
>
>> What's a good way to choose 15 colors? Or 20 colors? Or more?
>>
>> (adjacent colors should look different)
>
> Something like this
> <https://www.deviantart.com/default-cube/art/Related-Colours-726210156>,
> perhaps?

thanks... i'm surprised what i'm looking for isn't offered as default.

(10 default colors at)
https://matplotlib.org/stable/gallery/color/color_cycle_default.html

e.g. i want to get 50 colors like this:

(10 default colors)

(10 default colors) a little darker (and rotated in the Color wheel)

(10 default colors) a little lighter (and -rotated in the Color wheel)

(10 default colors) darker still (and rotated in the Color wheel)

(10 default colors) lighter still (and -rotated in the Color wheel)

darker/lighter (and rotation?) doesn't work for Black/White, does it?

1

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