I published a blog post on this yesterday and that includes the link to download my free .zip file.
Zazzle Print Safe Color Palettes
To summarize the post:
I took the "Print-Friendly" color swatches as offered in the new customer interface (184 of them currently) and labeled them all with the corresponding HEX value as assigned by Zazzle.
Then I made it into four separate .png files I could upload to Zazzle and put them on a folded 5x7 card (the only product I could think of with four distinct and equally-sized print areas). And then I layered a 3-color svg behind the swatch images to provide three color areas for testing HEX values in. With all three sections of the svg being available at once to change colors on, you don't have to keep switching to Background or other layer/element to try out a HEX value.
I published my Print-Friendly color-helper card so I can open it anytime in the Design Tool for my own reference.
However, that doesn't do anyone else any good, you all will only be able to access it as the new customer interface. So I packaged the parts into a Zip file you can use to make your own Hidden reference product you can access in the Design Tool. The Zip includes 7 files including my original PSD file with all the un-flattened text labels so you can edit as you wish.
Link to download is in the blog post (no time limit on editing blog posts so just better way for me to share a link as I can edit/change it anytime in the future).
*In case anyone is wondering, I needed to put the palettes on four different "sides" of something because even on something big like a duvet or shower curtain, you still only have the one small view in the design tool and they needed to be large enough to see without zooming. But you have the parts to make a reference product in whatever way works for you, and also the PSD file for off-line reference.
