I think I misunderstood your question in my previous response. Click on the word "Custom" to go to the palette, where you can select colors or enter hex codes. Once you choose "Apply" for the colors you want, they will auto-fill in those boxes for easy use in the asset.
Thanks Brooke - but will those colors work when I create a new email or is it only specific to that certain email? I'd like for it to update globally.
We do this by creating a mktoVariable that presents a restricted palette of primary/secondary (and maybe tertiary) colors, then hiding the color picker because I want to ensure they can only choose brand colors:
This thread seems to be missing some parts. Sanford Whiteman, where are you creating mktoVariables and how are you hiding the color picker? Is this within the template?
It's within the template, but the color picker is in the editor pane (Variables section).
And I am eliding the quite special JS in the template that makes this work.