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Is there a way to automate cover colors?

When I add a colored label to a card, I'd like to have the corresponding cover color added to the card. Is there a way to make this automated so I don't have to manually change it every time?

6 answers

1 accepted

5 votes
Answer accepted

Hi Ashley,

Right now, card cover automation isn’t available within Butler, but we're tracking the demand for it! I’ll pass your interest in this on to our team for consideration—let me know if there's any additional info you'd like for me to send their way.

If you're curious about how our team decides on what requests we work on, this article gives some insight into that process: We've also published a blog post with more detailed and visual information here:

If you'd like to see our latest features and releases you can take a look at our dev board at Our mobile boards are available at and

Please let us know if you have any other questions or concerns, and have a productive day! 

I am interested in this as well. 

Like # people like this

Ditto - this is a basic thing I need.

Like Veronica D likes this

Could really do with this

I have the same need.  Would LOVE this functionality!

Like Veronica D likes this

100% Same here!

Like Veronica D likes this

Agreed looking for this feature! 

Like Veronica D likes this

definitely a need!!! Please add this feature.

I'd also love to be able to automate cover color selection in Butler. Note that I don't want the label color applied -- I want to be able to specify which color is applied when I set up the Butler workflow.

Like # people like this

I'd like to be able to do this too.

Any idea if this will happen anytime soon?

Absolutely interested in access to automating cover color to help organize the board. 

Like Veronica D likes this

I would like this feature added to Butler as well.  Changing Card Cover colors would be most excellent workflow addition :-)

Like Veronica D likes this

I'm also looking for this automation. Working on a team board, so want the possibility to have card change colour depending on who it is assigned to. Will make monitoring a team board much easier for all participants. 

Please add this.

Like Veronica D likes this

I found this post because I was looking for this automation too. It would be great to be able to change or assign card cover colors automatically when you move a card to another list.

Me too. This can be very useful, as it makes the card stand out and look more important! Thanks.

Like Veronica D likes this

Another vote for YES PLEASE!

Like Veronica D likes this
Like Veronica D likes this

Add it please, would be super helpful for lead management, for example adding a $ Cover to a high income lead.

Like Veronica D likes this
Like Veronica D likes this

I would be interested in this also. Being able to create a Card Button that added a #tag and changed the cover would be very helpful.

Like Sara Lynch likes this

Vote yes to automate card covers/colors

Like Veronica D likes this

Yes to this - even if initially it is just the ability to remove a card cover (it is quite annoying that emails forwarded to a trello board often include an image in the signature block, which then get added to the card's cover.)

Like Sara Lynch likes this

yes please!

Yes please here too!

I would like to be able to move a card between lists on cover colour change.


The ability to set or detect a card's cover size and color, or changes thereto, within Butler workflows would be very useful.

The lack of this feature is primarily what holds me back from upgrading my plan. Cover colors would be helpful, but the ability to automate the addition of card cover images would be ideal. I use specialized card cover images to help me organize projects and activities within my boards. It can take a lot of time to set up a new week adding images manually. To have that cover automatically added when new cards are created would be a huge time saver and worth the upgrade on its own. 

Like # people like this

at my companie we need this aswell. we use the cover color to see what HAS to be done today, and so it would be a very nice thing that we could change cover color automaticly with butler.

Yes please! Would be very helpful.

I would love this - at minimum I would really like to upload a custom image for the cover to be available in ALL cards on a single board.

Right now I can upload to each card one by one and change the cover but I'd prefer to just upload the media once then pull from my own gallery (instead of the stock images or only colors) when customizing my card.

but automating would be even better!!

I would love this too - it is hard to explain to others to manually change the color each time - it would be great it it could be dependent on a custom field Drop down selection

this would be awesome!

JP I'm New Here Aug 14, 2021

I would love this feature! And I'm the app as well!

This would be SO useful.

(I'm on the Mac app.)

This is really a needed feature. Please make it happen.

This would be a really handy feature!

This would be really helpful. Please include it in your next update.

Yes please do this! Very helpful for people with ADHD and want things to be color coded automatically!

Although Butler currently can't change a card's cover directly via an Action, you can do it indirectly using Butler's cool new HTTP requests Action to send a suitable PUT request to the Trello REST API to update the card and set the values you want for the cover.

To do this, create a Butler rule, add the Trigger you want, then add an Action of the type Content and the sub-type 'put to url with payload'.


The url would be the endpoint for cards, followed by the variable that will be  substituted by Butler with the ID of the newly created card, which would be:{cardid}

and the payload would be the JSON formatted request that would contain your key, token, and the settings you want for the card's cover. For example, this payload would change the card's cover to green, full size:

{"key" : "[your_rest_key_here]","token" : "[your_rest_token_here]","cover" : {"color" : "green","size" : "full" }}

Here is the resulting Action:

Trello Butler card cover Action.png

Here is an example of that Action being triggered when a new card is created on the board:

Trello Butler card cover rule #1.png

Here is a closer look at the rule, showing the Action in more detail:

Trello Butler card cover rule #2.png

By altering the HTTP request's payload, you could set the card cover's color, size, text brightness etc.

This is fantastic! While Trello's card covers don't exactly result in the appearance I want, this definitely will get you there

Hey, thanks for this workaround! 

I'm struggling to get this to work but perhaps I'm making a mistake with the API codes—do the REST API values differ from the regular API values I've retrieved from

Any advice appreciated. 


EDIT: Never mind, it started working fine a while after I posted this!

Like Rosa Clark likes this

Darn. It's not working for me.  Here is the code. Thoughts about what I am doing wrong? Thanks


Are the api and regular keys different? 

@Rosa Clark No, that was the right key in the end. I've replied to your other comment with suggestions btw. 

@David Bakkers Hi David, thanks so much for this endlessly useful workaround. 

I was just wondering if you have a similar technique for automating the removal of card covers? I've tried a few approaches using bits from the REST API documentation but haven't had any success yet. No problem if not—I'm sure I'll get it eventually.

@Sarah Cole 

The cover is removed by 'resetting' all the values for the whole cover, like this:

{"key" : "[your_rest_key_here]","token" : "[your_rest_token_here]","cover" : ""}
Like # people like this

@David Bakkers Brilliant, that makes complete sense now you say it. Thank you very much for your help. 

PLEASE add this automation for Covers!

Here is an adaption of David Bakkers' excellent workaround: although David's fix worked for me in that it "did what it said on the tin", this isn't quite what I wanted - what I actually wanted was to apply a "header" or "partial" cover rather than a "full".  As you can see, I'm struggling to give a precise name to the type of header that I want and that same problem gave me grief when it came to trying to adapt the “payload”; I unsuccessfully tried updating the “cover” def' as follows:
{"color" : "green","size" : "part" }

{"color" : "green","size" : "partial" }

{"color" : "green","size" : "header" }

As I say, none of these attempts worked so I thought “what the hell, let’s just see if the default works” and I'm glad to report that this was successful with the simple:

{"color" : "green"}

The down-side to all of this is that this fix is dependent upon the current Atlassian implementation of the [Create a Rule] feature which I guess could change at any time.

Hello @Marcus 

The cover size can be set to one of two values: 'normal' or 'full', with normal being the default if you don't define a size.

To know more about the other settings for the cover, including putting a picture inside the cover or setting the brightness of the text compared to the background, refer to the Update a Card section of the Trello REST API documentation page.

Like Sarah Cole likes this

@David Bakkers  it did not work for me I tried everything 

@THIAGO MANGANELLI I couldn't get it to work but I left the new rules in place and they started working within a couple of days. Not sure what caused the delay, but it's fine now. Perhaps you have a similar issue?

@Sarah Cole Hi, i could not get this to work at all.  I want the card cover to turn green when a certain label is applied.  I got the API key from and I can manually generated the token from the link on the same page.   Any help would be great.  Thanks


trello api.png

@Rosa Clark Hi! The code does look right to me. When did you set this up and test it? Yesterday? Trello has been down on and off over the last couple of days and that's affected the automation—I found that even simple rules weren't working as expected.

If so, maybe delete it and try setting it up again today. 

I did find that it took a day or so for the card cover rule to start working for me after I set it up anyway. No idea why, maybe something to do with the API? I'll try setting up your rule shortly to see if I can replicate though, and report back! 

@Sarah Cole Thanks for the reply.  I just turned the rule back on and will see if it works. Did you find anything when you tested the rule? 

@Sarah Cole gaaahhh.... No go. It's been two days and I still get the error message "Butler could not run your rule when the yellow "Channel: Email" label is added to a card by anyone, put to URL".  Oh well, I tried! Thanks for the replies. 

Hello @Rosa Clark 

I can see something wrong. At the end of your token there is a right square bracket:

trello api.png

Keys and tokens contain only alphanumeric values (letters and numbers), like this:

Key: 00d2ac3c23e82d32545537e54feafb22
Token: 94a658cd2a6b32083ddeeff90cb721f7de6801e2a7d0f3fecadef5262fa0f351

so that square bracket should not be there.

My use of square brackets for [your_rest_key_here] and [your_rest_token_here] was just for demarcation. The actual put to url payload would be:

{"key" : "00d2ac3c23e82d32545537e54feafb22","token" : "94a658cd2a6b32083ddeeff90cb721f7de6801e2a7d0f3fecadef5262fa0f351","cover" : {"color" : "green","size" : "normal" }}


Like # people like this

Good spot @David Bakkers! I missed that completely—maybe it's time for new glasses...

Like Rosa Clark likes this

ah-ha! @David Bakkers that's a cut & paste error.  OK, I'll give it a try.  TYVM

It worked @Sarah Cole and @David Bakkers ! Thanks both for your help.

@David Bakkers @Sarah Cole Instead of making a new post on this, I figured adding on to this conversation might be valuable for others like me who find this thread from Google (especially since it's so fresh!)

I'm looking for a variant on using this API option to add a custom cover that's pulled from an Imgur album I made of various swatches to add custom cover color (so I don't have to worry about running out of the ones available from the Colors palette - is that also doable using a similar command?


Edit - Since I'm currently using the existing cover colors as a stopgap, what's the list of colors? I can see two "greens" and two "blues" - couldn't get any answers when I inspected the element in Chrome

@Jonathan Moore

Refer to the Update a Card section of the Trello REST API documentation, which documents all the cover settings, including the different colors and how to use images.

Using an image located anywhere other than Unsplash for the cover is not easy, since it will require that the image is already attached to the card and you know its unique attachment ID, which will require a pre-lookup of that ID using the REST API via a separate call.

Like Jonathan Moore likes this

I would also love it if this feature could be added!

0 votes

PLEASE, PLEASE add this ability!   The more visual you can make these cards, the more intuitive they will be and the faster we can process them.  If the purpose of automations is to speed up our work flow, having the ability to visually categorize our cards dramatically improve our efficiency.

Very interested also !

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