I'd like to show Sequential progression across several Qualitative categories, in a way that the Qualitative categories do not visually conflict. It's not as simple as picking 2 Sequential schemes from ColorBrewer because they tend to look very similar at the low range.

Currently I can hack it by looking at Diverging color schemes, going out from the center one way and the other way gives me what I want for 2 Qualitative categories. I think my best bet for now is going center-out across schemes "RdBu" and "PRGn", which gets me up to 4 qualitative categories, but may not be colorblind robust across all the 4.

Hello,

Do you think you may add a few new schemes, just like in D3.js 4.0 : https://github.com/d3/d3-scale/blob/master/README.md#interpolateViridis

Is there any way to get FIPS codes added to colorbrewer/map/map.svg so that I can work with the map in a custom environment?

Hello,
more a question than an issue: I would like to use the "Greens" and "Blues" palettes in one plot. I show distributions and use the palettes to indicate percentiles of the distributions. However, I have several distributions from two conditions and I would like to use the "Greens" to show percentiles of the distibutions of one condition and "Blues" for the other ones. Is it possible to choose the palette depending on a value in the data set?
Thank you for any help!
Lilla

Hi!

I found that https://colorbrewer2.org does not work and while using unprotected http://colorbrewer2.org someone can do things like man-in-the-middling the connection, inserting evil JavaScript, and have my browser execute it. It would be great to have https:// working for colorbrewer2.org. I'm happy to help with setting up Let's Encrypt if help is needed.

Thanks and best, Sebastian

The CMYK & RGB values do not match in (at least) the 7-class GnBu scheme. As an example, class 3 has CMYK of 70/5/0/0, and the given RGB is 78/179/211 — but Illustrator suggests that the same CMYK should have an RGB of 0/184/236. And, indeed, the color looks different between AI & Colorbrewer

I'd be really happy to have support for like 30 data :D

Looks like there is either a zindex issue with the data class dropdown or a passive suggestion that choosing this color schema with this many classes is a bad idea 😛

At least the following link is dead:
https://colorbrewer2.org/export/ase/Set1_8.ase
(trying to download ASE for Set1)

Some others seem to be ok

This code/repo should have some kind of license file, and we should be sure Cindy is okay with whatever it is.

Hello,
Thanks for the great site.
I've just noticed that the redirect from http://colorbrewer.org/ to http://colorbrewer2.org/ isn't working.
I just get a ERR_CONNECTION_REFUSED message.
Best wishes,
Nick.

Good idea via some Twitter conversation: update the URL hash as options are changed, so you can copy a direct link from the browser address bar instead of the export panel.

Hello.

I would need your help in understanding if I can use a screenshoot of "colorbrewer2.org" in an MOOC.

The project is released under Apache2, and on the website it is stated "© Cynthia Brewer, Mark Harrower and The Pennsylvania State University".

I tried to contact them but without success.

Do you have any advice on which kind of license would be applied to a screenshoot of your website, and/or how can i contact the copyright holders?

Many thanks!

There is an xss vulnerability in n= and probably the other parameters. I Think I know where the vulnerability originates, but I don't have time currently to fix it.

colorbrewer2.org/#type=sequential&scheme=BuGn&n=<script>alert("hello world");</script>

The sentence

You will need Excel installed to open this file (it is not a web-page link).

is not true. In fact other programs are able to open XLS files correctly, e.g. Libreoffice Calc.

As you can see in the picture the layout doesn't work. The elemnts of the left pane are overlaying each other. This firefox was running without addons ("SafeMode") to be sure it is not about my AddOns.

To reproduce:

1. Go to ColorBrewer
2. Set the number of classes to 7
3. Choose PuRd (or most any other color scheme)

One county in Arkansas remains green.

https://colorbrewer2.org/#type=diverging&scheme=BrBG&n=4

The listed CMYK values are incorrect relative to the color shown. For example, Hex #018571 should be CMYB(99%, 0%, 15%, 48%) but is listed as 100,10,55,0.

With the Dark Reader browser extension enabled in Firefox, HEX values for the colors do not match when initially displaying some schemes. They do display the matching values after switching to RGB/CMYK and then switching back to HEX.

I'm going to disable the extension for the site, but other people with this extension might not realize the issue.

There seems to be only very few quantitative maps, and there is no map that is colorblind and photocopy friendly.
The one photocopy friendly quantitative map only allows for 3 colors, and it looks to me that two of them are actually identical when converted to gray-scale...

I'm trying to use brewer.pal with hundreds of graphs, and it would be nice if it gave me the same number of colors I ask for when n=1 or n=2 (instead of returning 3).

It would remove the need to create a custom workaround to handle those cases. Thanks!

The ColorBrewer.style for ArcMap is not available under downloads any longer - why?

Several links seem to have been broken in the last year, as a result of PSU changing/removing their personal web site service. Namely:

• ColorBrewer1 link
• Cynthia Brewer personal link
• DgQg link
  (and several others)

My main monitor is in portrait position, 1080x1920. The site is cramped in less than the upper third of the screen. I also tried a 10" tablet, same issue.

When exporting ramp from http://colorbrewer2.org/#type=sequential&scheme=Reds&n=9,
there is an export option for a JSON array, (thank you, btw)

['#fff5f0','#fee0d2','#fcbba1','#fc9272','#fb6a4a','#ef3b2c','#cb181d','#a50f15','#67000d']

would it be possible to export other JSON structures, such as Mapbox data-driven styling

[
  [stop1, '#fff5f0'],
  [stop2, '#fee0d2'],
  [stop3, '#fcbba1'],
  [stop4, '#fc9272'],
  [stop5, '#fb6a4a'],
  [stop6, '#ef3b2c'],
  [stop7, '#cb181d'],
  [stop8, '#a50f15'],
  [stop9, '#67000d']
]

Live demo at https://beta.observablehq.com/@roblabs/mapbox-data-driven-styling-of-circles

It may be messy, and not what you intended, but just throwing this up there.

Thanks for an excellent tool.

File under would be nice

Issues filed here will have a better chance of leading to satisfaction (which is what everyone wants to get).

Just a quick note to say that I use this a lot and find myself recommending it again and again (and did so again today).

Thanks so much for making this available and keeping it alive.

--Daniel Moul

Minor issue, and I know it's addressed in the pop-up help, but..
Under "Only Show:"
"Print friendly" should be "colour print friendly" for clarity, as a user could misunderstand it means black & white print friendly.

Hello, this is a great resource. The links to the XLS files under "downloads" tab are broken. I was able to get them via archive.org. Please repair these links. Thanks!

Currently, only colorblind safe, print friendly and photocopy safe can be filtered. Each color scale has four characteristics though:

It should be possible to filter by LCD-friendly.

I would like to see support for circular data types. Circular data is ordered, but unlike sequential data the scale 'wraps around' so there is no true zero value, and no absolute notion of high or low (only relative comparisons can be made).

Examples of circular data:

• Angles (directions, rotations)
• Time periods (time of day, time of year, etc.)
• Musical pitch (C→D→E→F→G→A→B→C...)
• Color! (as perceived by humans) (R→O→Y→G→B→I→V→R...)

Thanks for the great tool BTW! :)

That link is broken. I believe we should send people here instead -> https://gis.cancer.gov/tools/colortool/

Link Back to Flash version is dead.

Hey there!

I'd like to report a security issue but cannot find contact instructions on your repository.

If not a hassle, might you kindly add a SECURITY.md file with an email, or another contact method? GitHub recommends this best practice to ensure security issues are responsibly disclosed, and it would serve as a simple instruction for security researchers in the future.

Thank you for your consideration, and I look forward to hearing from you!

(cc @huntr-helper)